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Fuel Market Report: Feb 8th – Feb 14th, 2026 1024 683 Star Oilco

Fuel Market Report: Feb 8th – Feb 14th, 2026
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Did You Know That R99 Is The Same Cost As Diesel Currently?

Call to set up R99 Mobile Fueling Onsite Service in Portland at the same cost of retail diesel. Dyed untaxed R99 is also available. Give us a call today to schedule your delivery.

Wholesale Price Average 2/14/26

Wholesale LowWholesale Avg
E10$2.42$2.56
B5$2.73$2.82
B20$2.66$2.79
R99$2.29$2.35

Average Retail Prices 2/14/26

NationalOregonWashington
E10$2.92$3.68$4.15
B5$3.65$4.13$4.77

Taxes

FederalState: ORLocalState: WA
Gas$0.184$0.40$0-.13$0.494
Diesel$0.244$0.40$0-.13$0.494

Portland Retail Fuel Price Variance

Fuel Market News

Fuel prices are up for the third consecutive week as prices jumped over $0.20/gal on gas and $0.12/gal on diesel this past week. Rack averages in Portland jumped $0.29/gal for regular E10 gasoline, and $0.13/gal for B5 & B20 diesel. The average retail price for gas in Portland has increased by $0.22/gal over the last two weeks. In part, this is due to current geopolitical tensions between Iran and the U.S along with higher crude oil prices, extreme storm weather across the nation, and refineries beginning to switch back to summer blend gas as we approach the spring season starting March 20th. We should expect prices to continue to trickle upwards as the switch to summer blend gas creates logistical and operational challenges affecting pricing and distribution.  

fuel-market-report-star-oilco-5-18-24

Important Note: Per the City Of Portland, “Distributors in the City of Portland are required to meet the minimum biofuel content requirements for all fuel they distribute beginning on May 15, 2024. All diesel fuel distributed to retail stations, non-retail dealers, or wholesale purchaser-consumers must include a minimum of 15% biofuel content, from either renewable diesel or biodiesel. This requirement increases to 50% on May 15, 2026, and 99% on May 15, 2030”.

Reasons For Price Variance

Oil Prices Above $60

OPEC+ Strategic Pause

Crude oil is trading above $60, at a current price of $63.73/barrel. This is $1.78/barrel higher than the week prior.

Crude oil is the main ingredient for gasoline and diesel. Per AAA, on average about 50% of what you pay at the pump is the price of crude oil, breaking down as 25% refining, 11% distribution & marketing, and 14% taxes – a helpful breakdown for consumers wondering why they are paying the prices that they pay. Crude Oil is currently trading at $63.73/barrel compared to $61.95/barrel last week and $71 a year ago.

It’s essential to recognize that fuel prices result from a complex interplay of the factors mentioned above and other regional factors. Additionally, prices may vary by specific regions within Oregon and Washington. For the most precise and up-to-date information on fuel prices and the causes for these price changes within your area, use the links below for AAA & GasBuddy.

If you have any questions, feel free to contact Star Oilco and speak to one of our fuel market advisors to discuss how the market can impact your business.

Set up your R99 Mobile Fueling Onsite Service in Portland Today Including Dyed Untaxed R99.

Give Us A Call Today

For other news in the fuel market:

● https://gasprices.aaa.com/?state=OR

● https://www.gasbuddy.com/charts

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Winter Diesel Additives For Portland Weather 1024 768 Star Oilco

Winter Diesel Additives For Portland Weather

How to Prevent Diesel Fuel from Gelling in Low Temperatures

When the chill of winter arrives in Portland and across Oregon, diesel engines face a unique challenge. Cold temperatures can transform diesel fuel from a fluid state into a gel-like substance, leading to significant engine issues. Understanding and combating these cold-weather challenges is crucial for optimal diesel performance

Understanding Cold-Weather Diesel Challenges

As temperatures drop in Portland, diesel fuel, known for its efficiency and power, encounters an Achilles’ heel—the tendency to gel. This gelling occurs primarily due to the crystallization of the waxes naturally present in diesel. When these waxes crystallize, they can clog fuel filters and lines, hindering fuel flow and causing engines to struggle or even fail to start. This is a common situation for those familiar with traveling in colder areas of Oregon, emphasizing the importance of preventive measures to ensure the uninterrupted performance and reliability of diesel machinery and vehicles.

Star Oilco black fuel delivery truck driving through snow during winter storm

The Science Behind Fuel Gelling and Wax Crystallization

Diesel fuel has a natural reaction to cold weather because it contains paraffin waxes. These waxes are helpful in warm weather because they provide energy to the fuel. But when temperatures get colder, the waxes start to solidify, just like water turns into ice when it freezes. As the temperature drops, the waxes form crystals that grow larger and make the fuel thicker.

This process is called crystallization, and it makes the fuel less fluid, which can cause gelling. When diesel fuel gels, it becomes thick and sludgy, like a semi-solid. This makes it difficult for the fuel to flow through the engine, which can lead to serious problems for diesel engines.

The formation of these wax crystals is a big issue because they can clog fuel lines and filters, stopping the engine from running properly. When fuel can’t move smoothly through the system, engines can stall or fail to start altogether. This is why gelling is such a major concern for diesel engines during cold weather, and it’s important to find solutions to prevent it from happening.

Introduction to Cold Flow Improvers

To address the issue of gelling, additives known as cold flow improvers have been developed. These chemical additives prevent diesel from gelling in cold temperatures by targeting wax crystals in the fuel. They keep these crystals small and dispersed, ensuring diesel remains fluid and pumpable. This functionality is crucial for maintaining smooth engine operation and fuel system efficiency in cold climates, such as those experienced in Portland and other areas of Oregon, without altering the diesel’s inherent properties.

How Cold Flow Improvers Work

Star Oilco diesel service truck parked in front of a snow-covered log cabin in the Oregon woods

When diesel fuel gets cold, it can start to thicken because wax crystals form inside it. These wax crystals can grow and stick together, which makes the fuel hard to flow through the engine. Cold flow improvers are special additives that are designed to stop this from happening.

At a molecular level, cold flow improvers change how diesel behaves in cold temperatures. They target the process where wax crystals form and grow. Normally, when it gets cold, these crystals start to connect with each other, and that can cause clogs in fuel filters or slow down fuel flow. But when cold flow improvers are added to diesel, they act as nucleation inhibitors. This means they stop the wax crystals from growing too big or interlocking with each other.

Because of this, the fuel stays fluid and can still flow smoothly, even when temperatures drop. Cold flow improvers help ensure that diesel engines run properly in cold weather by keeping the fuel from gelling up. This keeps fuel filters from clogging and helps the engine perform better, so vehicles and equipment can operate reliably, even in the winter

Benefits of Cold Flow Improvers

Cold flow improvers have proven valuable for businesses in Portland, OR, that rely on diesel-powered equipment, especially during the chilly, wet winter months. Here are a few examples of how these additives can benefit equipment performance:

1. Reduced Fuel Gelling in Cold Temperatures

  • Problem: Diesel fuel can start to gel when temperatures dip, leading to clogged fuel lines and filters. This is especially problematic for trucks, construction equipment, and other diesel-powered machinery that operates outdoors.
  • Solution: Cold flow improvers lower the temperature at which diesel fuel thickens, preventing gelling. This keeps machinery running smoothly during cold snaps, even when temperatures fluctuate widely across Portland’s winter.

2. Improved Fleet Reliability for Delivery and Transport Services
  • Problem: Delivery trucks and transport services often face delays or downtime due to fuel issues in the winter, as fuel flow can slow or stop altogether.
  • Solution: By using cold flow improvers, delivery companies keep fuel flowing reliably in suboptimal weather. This reduces the risk of late deliveries and unplanned maintenance, helping fleets stay on schedule and lowering operational costs.

3. Enhanced Performance for Emergency Backup Generators
  • Problem: Many commercial and industrial businesses in Portland rely on backup generators to kick in during outages, but generators need reliable fuel flow to work properly in cold temperatures.
  • Solution: Adding cold flow improvers to generator fuel storage ensures that fuel remains liquid and usable during winter, helping businesses maintain critical operations in power outages.

4. Lower Maintenance Costs for Construction Equipment
  • Problem: Heavy equipment used on construction sites, especially in winter months, can suffer from fuel blockages, leading to breakdowns and costly repairs.
  • Solution: Cold flow improvers prevent fuel line blockages and improve equipment reliability, reducing maintenance expenses and keeping projects on track, even during Portland’s colder periods.

By adding cold flow improvers, businesses across Portland can minimize disruptions due to cold weather, maintain reliable equipment performance, and reduce winter-related repair costs. This small addition to fuel management can make a significant difference in operational efficiency and reliability during the cold months.

Monitoring Fuel Usage

Using cold flow improvers offers several essential benefits for diesel engines in cold weather:

Prevent Fuel Gelling and Filter Clogs
These additives keep wax crystals small, preventing filter blockages.

Enhance Fuel Flow and Engine Performance
Improved fluidity leads to better engine efficiency and reliability.

Prevent Downtime
Using cold flow improvers can help avoid costly equipment downtime due to fuel system gelling.

Ensure Operational Reliability in Cold Climates
These additives are vital for the consistent performance of diesel engines in winter conditions.

Cost-Effective
Cold flow improvers enhance fuel efficiency and reduce maintenance needs, offering long-term cost savings.

Star Oilco fuel delivery truck parked beside commercial fleet vehicles on a wet asphalt lot

Star Oilco’s Winterized Diesel Offering

If you’re purchasing fuel in Portland or throughout Oregon, consider sourcing from a fuel supplier that provides winterized diesel, like Star Oilco. Star Oilco’s winterized diesel includes these crucial additives, ensuring you have the right protection against gelling. This can save you time and help maintain optimal performance during the cold months​ in the Pacific Northwest.

Star Oilco is a trusted fuel supplier based in Portland, Oregon, dedicated to delivering high-quality fuels and related services to both commercial and residential customers. With decades of industry experience, the company offers a wide range of solutions, including heating oil delivery, off-road diesel, cardlock fueling systems, and emergency backup fuel options. Committed to sustainability, Star Oilco also provides biodiesel and renewable diesel to reduce environmental impact while supporting the energy needs of the Portland community. From optimizing fleet fuel efficiency to ensuring reliable heating in colder months, Star Oilco prioritizes customer satisfaction with tailored, dependable fuel solutions for businesses and homeowners alike.

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Ensuring the Right Dosage

The effectiveness of cold flow improvers depends heavily on using the correct dosage. Over- or under-dosing can lead to suboptimal performance or damage to the fuel system. Consulting with a fuel specialist is recommended to determine the appropriate amount of cold flow improver needed for specific applications, taking into account the fuel properties and temperature forecasts.

Cold flow improvers are essential for diesel engines during winter, especially in Portland and Oregon, ensuring optimal performance in cold climates. They prevent fuel gelling and wax crystallization, maintaining fluidity and engine efficiency. Their role is vital in providing operational reliability and cost-effectiveness for those reliant on diesel fuel during colder months. Embracing these improvers allows you to face winter’s challenges confidently, safeguarding engine performance and longevity.

For more guidance on keeping your diesel running smoothly this winter, or to explore Star Oilco’s winterized diesel options, don’t hesitate to reach out or visit our website today!

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Biofuels industry exceeds EPA’s expectations 1024 618 Star Oilco

Biofuels industry exceeds EPA’s expectations

Biofuels Industry Surpasses Expectations with a Massive Production Rise

Based on the data, biomass-based diesel production has increased massively in the United States, including biodiesel, renewable diesel, sustainable aviation fuel, and heating oil. Biomass-based diesel was expected to produce 4 billion gallons in 2023. Biofuel production and use increased by one billion gallons from last year to this year, which is a big jump. As a result of this achievement, a breakthrough has been achieved. The industry has surpassed what the EPA once thought was impossible with the development of advanced biofuels derived from sustainable sources.

So the real question is, what if we don’t choose biodiesel or renewable diesel over petroleum diesel for our diesel engines?

Biofuel production from plant oils and renewable crops for clean diesel alternatives

  • Biofuel production soared in 2023, exceeding EPA goals.

  • US biomass-based diesel production (biodiesel, renewable diesel, SAF, heating oil) reached 4 billion gallons.

  • Biofuel production and use jumped by 1 billion gallons year-over-year.

Clean Fuel Industry Beats Regulations in Decarbonization Push

While the Clean Fuels Alliance urged the EPA to set even more ambitious goals, like increasing biomass-based diesel production by 500 million gallons a year over the next three years, the EPA has taken a more conservative approach. Regulations aren’t keeping up with the industry, but it’s not waiting for them. Clean fuels are becoming more accessible and heavy-duty transportation fuels used by aviation and maritime are getting decarbonized. The industry has shown its ability to grow quickly and sustainably thanks to this collaborative effort.

  • Clean Fuels Alliance pushed for aggressive EPA goals: 500 million gallons annual increase in biomass-based diesel production for 3 years.

  • EPA’s finalized standards took a cautious approach.

  • Oil and gas producers, refiners, distributors, and retailers don’t have to wait for strict regulations to act (producers, refiners, distributors, retailers).

  • Industry collaboration demonstrates the potential for rapid, sustainable growth.

Decarbonization concept with CO2 reduction icons over a globe in green grass symbolizing clean energy
lose-up of a red fuel nozzle at a green diesel pump
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Despite this year’s achievements, the Clean Fuels Alliance remains focused on the future. There’s so much potential in sustainable biofuels that we think the EPA hasn’t tapped into yet. Supporting biodiesel, renewable diesel, and SAF production can help achieve clean energy progress.

In reality, why wouldn’t we make the switch to lower our carbon emissions today?

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comparison chart showing difference between off-road diesel and on-road diesel fuel in Portland OR
The Future of Diesel Fuel 940 788 Star Oilco

The Future of Diesel Fuel
Retail Diesel Dispenser Example
Retail Diesel Pumps with a variety of blends of diesel. Biodiesel, Renewable Diesel, and Fossil Diesel blends shown in Portland, Oregon.

Diesel Fuel In Oregon and Washington

Star Oilco has been getting questions on the changes of diesel in Portland, Oregon.  If you have not noticed, many diesel pumps at retail gas stations and cardlock have seen changing stickers on the face of the fuel pumps.  As of July 1st, 2024 the City of Portland requires a minimum 15% biofuel content of all diesel sold.  This policy is called the Portland Renewable Fuel Standard.

This has caused quite a few changes in what fuel pumps have for fuel.  Diesel fuel buyers are noticing the bright yellow color of B20 biodiesel, the water clear color of Renewable Diesel or a a mix of several fuels tinting the color of their diesel.  This trend is bigger than just Portland.

Today on the west coast there are a variety of product label stickers you will see on diesel pumps.  These show the variety of diesel fuel specifications that are being sold to diesel vehicles today. Blends of petroleum ultra low sulfur diesel, R99 (99%) renewable diesel, and B99 (99%) Biodiesel are combined to meet the market needs of the diesel we all buy.

This change is because of a combination of pure market forces, government rules and local decisions by fuel haulers.  Today’s diesel not only has a commodity market for the fuel it also has a market for CO2 credit value and a cap of total petroleum diesel fuel that can be sold into a west coast state with a “Cap and Invest” program requiring blends of low CO2 biofuels, the liquid fuels sold for vehicles.

Add on top of these market forces, advances in technology used to make the liquid diesel fuel.  The diesel arriving at truck stops, gas stations, cardlock or out of a hose from a bulk truck has been changing and it’s often in good ways.  Knowing how can be helpful in navigating why diesel may cost one price or another and may have a need or maintenance that another fuel does not.

THE RISE OF RENEWABLE DIESEL

Renewable diesel is a synthetic diesel fuel made from the same feedstock as biodiesel, but the finished product is hydrocarbon diesel.  Though it is a biofuel, it is also diesel. For fuel regulation they refer to it (as well as biodiesel) as “Biomass Based Diesel” for labeling at the fuel pump.

There have been billions of plant capacity brought online for renewable diesel.  During the COVID collapse of fuel prices a number of petroleum refineries shut down, then upgraded their technology to make hydrocarbon diesel fuels out of the very biobased fats, oils, and greases biodiesel is made from.  These refineries use hydrotreating technology just like they do with a crude petroleum to make an actual hydrocarbon diesel molecule.   With this technology adoption to make diesel and jet fuels from vegetable oils and animal fats billions of gallons of low CO2 diesel fuels are coming on the market and governments are requiring it’s use, such as Portland’s Renewable Fuel Standard.

Renewable Diesel Consumption it the US Source: Alternative Fuels Data Center

THE AVAILABILITY OF BIODIESEL

The US makes billions of gallons of biodiesel.  A fuel that’s quality and performance continues to improve.  If you are not a fan of biodiesel in your fuel thinking strategically about the fuel will likely benefit your fleet operation.  The big concern with diesel fuel in a ultra low sulfur world is water and dirt suspended in the fuel affecting the performance of diesel emission systems.  With clean and drier quality specifications of B99 blend stocks today versus a decade ago the use of this fuel has grown substantially especially in the truck stop market.

When crude petroleum prices are high and therefore refined diesel prices are equally as high biodiesel is often an extremely competitive fuel.  If a large seller of diesel (including petroleum refiners) can pick up pennies per gallons on millions of gallons sold they will do so.  Therefore Biodiesel is often seen in diesel in small blends even if you do not see a label on retail pump.  For blends above 5% a label is required for retail fuel sales. RTHWEST?

R99 Renewable Diesel label indicating 99% biomass-based diesel content
Ultra Low Sulfur Retail Diesel Label
Biodiesel Blend Percentage label for retail diesel dispenser

Above are a variety of labels used to denote what fuel blend is coming out of a retail diesel dispenser. Feel free to call Star Oilco at 503-283-1256 if this confuses you and you want it explained.  We would be glad to do so.

These labels can be found together often at one pump.  All state and Federal standards require ultra low sulfur diesel for any on-road diesel sale.  The Federal standards also adopted by the states require a disclosure at the fuel pump if a blend is above 5% biodiesel.  The max allowable blend of biodiesel for diesel truck manufactures is a 20% blend.  If a truck dealership says that you cannot blend biodiesel up to 20% they need to take that up with the Federal Government because they need to support it.  This is why the label shows a blend may contain between 5% and 20% biodiesel content.

Renewable diesel is a hydrocarbon diesel. 

 

It is diesel meeting the ASTM D975 specification for diesel. 

Retailers selling blends of R99 in their fuel do not need to label it given this.  They still do label it given the benefits of the fuel’s performance and that customers are seeking that fuel.

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Many retail places will have stacked labels showing they may be blending 5% to 20% biodiesel as well as may be adding R99 Renewable Diesel to the fuel as market conditions dictate it is the more cost competitive fuel.  When seeing a label like this it can usually be assumed they are blending a R80 (80% Renewable Diesel) and a B20 (20% Biodiesel) blend of fuel.  This blend is actually believed by some to be a higher performing fuel seeing better performance that a R99 or B20 fossil fuel blend.

Fossil fuel diesels are being replaced or blended with biomass based diesels.  Be it Renewable Diesel or Biodiesel.  These blends are driven by more than one industry requirements, government rules, or other market forces. One of these being Portland’s banned on petroleum diesel through the Renewable Fuel Standard (RFS). This is resulting in an increase of low-carbon biofuel blends that will ultimately move to a mix of 99% renewable fuel requirement by 2030.

Renewable Diesel and Biodiesel Blend fuel dispenser label.

The big drivers are industry specification for fuels (both labeling as well as chemical characteristics), state rules on selling these fuels, their quality assurance as well as CO2 content, and of course the market forces.  Market forces being the supply and demand availability of fuel needed to meet customers.  Less fuel available to sell means higher prices for customers.

A decade ago the market for diesel was far simpler. Though you had biofuels and some blend mandates basically you had a diesel specification accepted and the daily price as tracked by a lighted retailers sign, a wholesale market average or spot buying by some customers.   Today this market is far more complicated by government regulation on the west coast.  There are three big programs at state levels impacting this.

State Fuel Rules cause a unique need for one state or another. Whereas twenty years ago if Oregon or Washington fuel was selling for more than the Gulf Coast you might see brokers bring fuel into the region then driving down high prices.  With the creation of various complex and unique rules on diesel, imports of fuel to these low CO2 fuel states has dropped.  The amount of people moving product into west coast states has dropped.  The big rules causing this are the Cap and Invest programs of the West Coast states, the Low CO2 Fuel Standards of the states, and the fuel blend mandates of various jurisdictions of these states. For instance California now requires all off-road diesels but 99% renewable diesel.  Portland, Oregon also has a CO2 requirement and minimum 15% blend of biomass based diesel on all fuel sold in the state.

WHAT ARE THE DIESEL FUELS AND THEIR SPECIFICATIONS

Petroleum Diesel:
ASTM D975 Specification.

The ASTM D975 is a series of tests used to maintain consistent industry standard product performance for diesel fuel.  It includes among several tests cloud point, cold filter plug point (CFPP), several masurements of diesel fuel operability performance, intrained water content, sediment, carbon residue, ash, distillation, viscosity, sulfur, copper corrosion, cetane number, cetane index, aromaticity, and conductivity.

Renewable Diesel:
ASTM D975 Specification.

Renewable Diesel is following the same series of tests as petroleum refined diesel fuels.  It is the same ASTM D975 specification. Though Renewable Diesel has some different properties that exceed the ASTM specification of diesel.  Renewable Diesel is highly prized as a fuel because it typically is a cleaner and drier diesel fuel than petroleum diesel. This being seen by the tests on sediment and water content in a parts per million level.  Renewable Diesel content in diesel fuel can also be tested for looking for a C14 molecule (the chain typically created in a Hydrotreated Diesel process from fats, oils and greases.

Biodiesel (Methyl Esther):
ASTM D6751 Specification.

The ASTM for Biodiesel tests a mono-alkyl esters of long chain fatty acids derived from vegetable oils and animal fats. The testing for quality assurance covers an analysis for flash point, methanol, water and sediment, kinematic viscosity, sulfated ash, oxidation stability, sulfur, copper strip corrosion, cetane number, cloud point, acid number, carbon residue, total and free glycerin, phosphorus, reduce pressure distillation temperature, atmospheric equivalent temperature, combined calcium and magnesium, and combined sodium and magnesium.

For more on Biodiesel Use and Handling the National Renewable Energy Laboratory has a great book on the subject.

THE HISTORY OF DIESEL FUEL SPECIFICATIONS IN THE UNITED STATES

In the 1990’s the US EPA passed rules that demanded a phase out of sulfur in diesel fuel.  The presence of sulfur was very good for the fuel’s storage stability as well as fuel lubricity, but was horrible for air quality.   Additionally the big smog contributor was NOx (nitrous oxide) which was one of the EPA’s reason’s for pulling sulfur out of diesel.  For the EPA to get engine manufacturers to treat the NOx emissions at the tailpipe they needed all the sulfur gone (ultra low sulfur diesel) for modern diesel emission systems to be able to eliminate NOx as well as a host of other pollutants including particulates.

The story of changing diesel fuel standards in the US under the EPA is one of removing sulfur from our diesel fuel.  In 1996 the fuel refiners and sellers of diesel had to move the sulfur content of the fuel sold for on-road purposes to below a 500 parts per million standard. Commonly referred to as Low Sulfur Diesel fuel.   In 2006 the standard moved to a maximum of 15 parts per million of sulfur for all on road fuels.

In 2006 while the sulfur content of fuel was dropping the City of Portland released the first mandated blend of biodiesel content.  This being a 5% biodiesel blend.  The next year, the State of Oregon followed with its own Renewable Fuel Standard requiring this throughout the state.  This began the expectation of biodiesel in most diesel fuel in the Portland, Oregon area.  Washington also passed a similar policy for blending biodiesel but the enforcement and need for the fuel is less specific at Washington fuel pumps.

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Renewable Diesel vs Biodiesel 683 1024 Star Oilco

Renewable Diesel vs Biodiesel

What’s the difference and how do they compare in price? 

If you are looking for a cleaner and greener alternative to diesel fuel, you might have come across two options: renewable diesel and biodiesel. Both fuels are made from organic sources, such as vegetable oils and animal fats, but they have different production processes and properties. In this blog post, we will compare renewable diesel and biodiesel in terms of their pros and cons, as well as their prices and incentives in Oregon. 

What is Renewable Diesel? 

Renewable diesel is a fuel that is chemically identical to petroleum diesel, but it is made from renewable raw materials through a process called hydrotreating. Hydrotreating removes impurities and oxygen from the feedstock, resulting in a pure and refined fuel that can be used in any diesel engine without modifications or blending. Renewable diesel (R99) has a high cetane number, which means it ignites easily and burns efficiently. It also has a low cloud point, which means it can withstand cold temperatures without gelling or clogging filters. 

What is Biodiesel? 

Biodiesel is a fuel that is made from renewable raw materials through a process called transesterification. Transesterification converts the feedstock into fatty acid methyl esters (FAME), which are then blended with petroleum diesel at various ratios. Biodiesel can be used in most diesel engines, but it may require some modifications or adjustments depending on the blend level and the engine type. Biodiesel has a lower cetane number than renewable diesel, which means it may not ignite or burn as well. It also has a higher cloud point than renewable diesel, which means it may gel or clog filters in cold weather. 

The cost of renewable diesel and biodiesel depends on various factors, such as the type and availability of feedstock, the production process, the market demand, and the government incentives. In general, renewable diesel is more expensive than biodiesel, as it requires more complex processing and higher quality feedstock. According to the U.S. Energy Information Administration (EIA), the average wholesale price of renewable diesel in California was $3.06 per gallon in October 2021, while the average wholesale price of biodiesel was $2.76 per gallon in the same month. However, both renewable diesel and biodiesel can benefit from federal RIN’s and state credits such as the low carbon fuel standards, which can lower their effective prices and make them more competitive with petroleum diesel. As of July 10th of 2023 renewable diesel (R99) in Portland Oregon was 60 cents higher than biodiesel (B99). 

 Renewable Diesel vs Biodiesel Carbon Intensity 

According to CARB, the carbon intensity of biodiesel ranges from 14.85 to 67.45 gCO2e/MJ and, renewable diesel ranges from 15.84 to 62.86 gCO2e/MJ, depending on the feedstock and production pathway. The lowest carbon intensity for biodiesel is achieved by using waste cooking oil as the feedstock and renewable methanol as the transesterification agent. The highest carbon intensity is associated with using soybean oil as the feedstock and fossil-based methanol as the transesterification agent. The lowest carbon intensity for renewable diesel is achieved by using waste cooking oil as the feedstock and renewable hydrogen as the hydrotreating agent. The highest carbon intensity is associated with using soybean oil as the feedstock and fossil-based hydrogen as the hydrotreating agent. 

Fuel-Pathways-Carbon-Intensity-Values

Pros and Cons of Renewable Diesel and Biodiesel 

Both renewable diesel and biodiesel have some advantages and disadvantages compared to petroleum diesel. Here are some of the main pros and cons of each fuel:  

Renewable Diesel Pros: 

– Reduces greenhouse gas emissions by up to 75% compared to petroleum diesel 

– Reduces tailpipe emissions of particulate matter, nitrogen oxides, carbon monoxide, and hydrocarbons 

– Improves engine performance and efficiency with fewer regeneration cycles of the emissions system 

– Compatible with existing infrastructure and vehicles 

– Biodegradable and nontoxic 

Renewable Diesel Cons: 

– More expensive than petroleum diesel 

– Limited availability and supply 

– May increase emissions of sulfur dioxide 

Biodiesel Pros: 

– Reduces greenhouse gas emissions by up to 78% compared to petroleum diesel 

– Reduces tailpipe emissions of particulate matter, carbon monoxide, and hydrocarbons 

– Biodegradable and nontoxic 

– Supports domestic agriculture and energy security 

 Biodiesel Cons: 

– May increase emissions of nitrogen oxides 

– May cause engine problems such as injector coking, filter plugging, corrosion, and reduced lubricity 

– May degrade over time or when exposed to water or microbes 

Oregon Prices and Incentives for Renewable Diesel and Biodiesel 

Oregon is one of the states that has adopted a Clean Fuels Program (CFP), which aims to reduce the carbon intensity of transportation fuels by 10% by 2025. The CFP creates a market for low-carbon fuels such as renewable diesel and biodiesel by requiring fuel suppliers to either blend them with petroleum diesel or buy credits from low-carbon fuel producers. The CFP also provides incentives for consumers to use low-carbon fuels by reducing their fuel taxes. 

According to the Oregon Department of Environmental Quality (DEQ), the average price of diesel in Oregon as of November 2021 was $3.87 per gallon. The average price of biodiesel blends ranged from $3.88 per gallon for B5 (5% biodiesel) to $4.01 per gallon for B20 (20% biodiesel). The average price of renewable diesel was $4.05 per gallon. As of July 2023 the price of renewable diesel (R99) in Oregon was 50 to 60 cents higher than biodiesel (B99). 

The DEQ also provides a Fuel Cost Calculator that allows consumers to compare the costs and benefits of different fuels based on their vehicle type, fuel efficiency, annual mileage, fuel price, carbon intensity, and tax rate. According to the calculator, using renewable diesel instead of petroleum diesel would save an average consumer $34 per year in fuel costs and reduce their carbon emissions by 1.6 metric tons per year. Using biodiesel instead of petroleum diesel would save an average consumer $12 per year in fuel costs and reduce their carbon emissions by 0.8 metric tons per year. 

Renewable diesel and biodiesel are both viable alternatives to petroleum diesel that can help reduce greenhouse gas emissions and support renewable energy sources. However, they also have some trade-offs in terms of cost, availability, performance, and emissions. Consumers should consider their vehicle type, driving habits, fuel preferences, and environmental goals when choosing between these fuels. Oregon offers some incentives and programs to encourage the use of low-carbon fuels such as renewable diesel and biodiesel, which can help consumers save money and reduce their carbon footprint. 

Close-up abstract image of diesel fuel with suspended droplets and fluid motion
Diesel Quality Matters When Filling Your Tank 1024 512 Star Oilco

Diesel Quality Matters When Filling Your Tank

There are different grades of diesel fuel or diesel quality just like gasoline, and they can have a big impact on your vehicle’s performance, efficiency, and longevity. Quality diesel offers substantial benefits for your hard-working trucks, even when price is a major factor.

Clean Diesel: A Boost for Your Engine and the Environment

High-quality fuel goes beyond just powering your engine, unlike standard diesel. Like TOP TIER gasoline, premium diesel has enhanced cleaning additives. As a result, you’ll see a range of benefits that directly impact your vehicle’s performance, efficiency, and even your wallet. Let’s take a look at clean diesel’s advantages.

Clean diesel fuel being poured for quality assurance in Portland OR

  • Improved Performance: Clean fuel ignites readily, giving your engine a noticeable power boost and smoother operation.

  • Enhanced Fuel Economy: Every drop counts! Clean diesel allows you to travel farther on a single tank.

  • Reduced Emissions: Be eco-friendly – cleaner burning translates to less smoke and pollutants in the air.

  • Extended Engine Life: Protect your investment! High-quality diesel reduces wear and tear on your engine components, saving you money on repairs down the road.

Understanding Diesel Quality

Two key factors determine diesel quality: the cetane number and the sulfur content. The cetane number tells you how easily fuel ignites, like a spark plug’s rating. Higher cetane numbers mean smoother starts, less knocking, and better performance – essential for modern diesel engines that typically need 40 or higher cetane ratings. Sulfur, however, can damage emissions systems and engine components if too much is used as a lubricant. These days, sulfur content is capped at ultra-low levels (Ultra-Low Sulfur Diesel or ULSD), ensuring cleaner engines.

  • Cetane Number: This number indicates how easily fuel ignites. Higher cetane numbers mean smoother starts, less engine knocking, and better overall performance. Modern diesel engines typically require a 40 cetane rating.

  • Sulfur Content: Sulfur acts as a lubricant in diesel fuel, but excessive levels can harm emissions systems and engine components. Modern regulations limit sulfur content to ultra-low levels (Ultra-Low Sulfur Diesel or ULSD).
Clean diesel pouring representing quality diesel fuel delivery in Portland OR

Beyond the Pump: The Long-Term Value of High-Quality Diesel

While price at the pump is important, don’t let it overshadow high-quality diesel’s long-term value. Clean fuel isn’t just about saving money; it’s about keeping your car healthy. Clean diesel unlocks a bunch of benefits: a smoother ride and more power, better fuel economy that lets you go farther on each tank, fewer emissions so you don’t have to worry about air pollution, and a longer engine life, so you don’t have to spend money on repairs. Do you want to feel the difference? The next step is to find a good diesel provider. Thanks to enhanced cleaning additives, many stations prioritize clean diesel. Discover how clean diesel can improve your vehicle’s performance, efficiency, and longevity by researching stations near you.

Imagine a scenario where cleaner diesel offered similar performance and reliability to regular diesel. What other factors might still prevent you from making the switch?

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Fuel Market Report: Jan 25th – Jan 31st, 2026 1024 683 Star Oilco

Fuel Market Report: Jan 25th – Jan 31st, 2026
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Did You Know That R99 Is The Same Cost As Diesel Currently?

Call to set up R99 Mobile Fueling Onsite Service in Portland at the same cost of retail diesel. Dyed untaxed R99 is also available. Give us a call today to schedule your delivery.

Wholesale Price Average 1/31/26

Wholesale LowWholesale Avg
E10$2.13$2.27
B5$2.61$2.78
B20$2.59$2.73
R99$2.27$2.38

Average Retail Prices 1/31/26

NationalOregonWashington
E10$2.88$3.46$3.94
B5$3.60$4.06$4.71

Taxes

FederalState: ORLocalState: WA
Gas$0.184$0.40$0-.13$0.494
Diesel$0.244$0.40$0-.13$0.494

Portland Retail Fuel Price Variance

Fuel Market News

Fuel prices are up this week across the board as diesel and gas prices increased by over $0.20/gal. Rack averages in Portland jumped $0.24/gal for regular E10 gasoline, and $0.30/gal for B5 & B20 diesel. These price increases also hit the retail market, with prices up $0.13/gal on the AAA average. Crude oil is just above $60/barrel for WTI crude, up $2/barrel from the previous week. This is the highest increase in crude oil pricing we have seen in multiple weeks and is partially responsible for why prices jumped so significantly this week.

fuel-market-report-star-oilco-5-18-24

Important Note: Per the City Of Portland, “Distributors in the City of Portland are required to meet the minimum biofuel content requirements for all fuel they distribute beginning on May 15, 2024. All diesel fuel distributed to retail stations, non-retail dealers, or wholesale purchaser-consumers must include a minimum of 15% biofuel content, from either renewable diesel or biodiesel. This requirement increases to 50% on May 15, 2026, and 99% on May 15, 2030”.

Reasons For Price Variance

Oil Prices Above $60

OPEC+ Strategic Pause

Crude oil is trading just above $60, at a current price of $61.95/barrel. This is $2.52/barrel higher than the week prior. 

Crude oil is the main ingredient for gasoline and diesel. Per AAA, on average about 50% of what you pay at the pump is the price of crude oil, breaking down as 25% refining, 11% distribution & marketing, and 14% taxes – a helpful breakdown for consumers wondering why they are paying the prices that they pay. Crude Oil is currently trading at $61.95/barrel compared to $59.43/barrel last week and $72 a year ago. 

It’s essential to recognize that fuel prices result from a complex interplay of the factors mentioned above and other regional factors. Additionally, prices may vary by specific regions within Oregon and Washington. For the most precise and up-to-date information on fuel prices and the causes for these price changes within your area, use the links below for AAA & GasBuddy.

If you have any questions, feel free to contact Star Oilco and speak to one of our fuel market advisors to discuss how the market can impact your business.

Set up your R99 Mobile Fueling Onsite Service in Portland Today Including Dyed Untaxed R99.

Give Us A Call Today

For other news in the fuel market:

● https://gasprices.aaa.com/?state=OR

● https://www.gasbuddy.com/charts

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Star Oilco fuel service truck refueling a McKinney refrigerated trailer at a commercial loading dock
The Pros and Cons of Renewable Diesel in Your Diesel Truck  1024 768 Star Oilco

The Pros and Cons of Renewable Diesel in Your Diesel Truck 
Yellow Star Oilco truck at sunrise on a rural Oregon property

The Pros and Cons of Renewable Diesel in Your Diesel Truck 

 As the world continues to become more aware of sustainable alternatives, renewable biodiesel (otherwise known as R99) has emerged as a promising solution to reduce carbon emissions in the transportation sector. Diesel truck owners, for example, may wonder whether they can switch to renewable diesel and contribute to a greener future as the city of Portland will be enforcing new restrictions and limitations on carbon emissions. Here is more information on the feasibility of using renewable diesel in diesel trucks and looking at the benefits and possible challenges. By understanding the advantages and limitations, you can make an informed decision about integrating this renewable fuel into your trucking operations.

1. Understanding Renewable diesel:

Renewable diesel is a clean-burning alternative fuel derived from natural sources such as vegetable oils, animal fats, and recycled cooking oil. It is produced through a process called transesterification, where the oils or fats are chemically reacted with alcohol to separate the glycerin from the fatty acids, resulting in renewable diesel. This sustainable fuel can be used in diesel engines with little to no modifications, making it a viable option for diesel truck owners. 

 

2. Environmental Benefits of Renewable Diesel:

Renewable diesel (known as R99) has significant environmental benefits. Renewable diesel reduces greenhouse gas emissions, such as carbon dioxide, sulfur dioxide, and particulates matter, compared to traditional diesel. It has lower levels of harmful pollutants, contributing to improved air quality and reduced smog formation. Additionally, renewable diesel is biodegradable, non-toxic, and significantly minimizes net carbon dioxide emissions over its lifecycle, making it a valuable tool in mitigating climate change. 

 

3. Compatibility and Performance:

While renewable diesel is compatible for diesel engines as a drop in solution, its essential to consider any factors before switching. Renewable diesel has a slightly lower energy content than regular diesel, which can result in a slight decrease in fuel economy.

 

4. Availability and Infrastructure:

Is renewable diesel readily available? While renewable diesel is becoming more widespread, its availability may vary depending on your location. Star Oilco offers delivery of renewable diesel (R99) to the Portland, Oregon surrounding area as well as Vancouver, Washington. You can reach out to us to get a quote based on your location and service needs. 

Renewable diesel offers a promising alternative for diesel truck owners who want to reduce their environmental impact. With its environmental benefits, compatibility with diesel engines as a drop-in solution, and ongoing availability improvements, renewable diesel presents a viable solution to achieve sustainable transportation and it contributes to a greener future across the Pacific Northwest.

Call Star Oilco today to discuss using Renewable Diesel as a drop-in solution for your diesel trucks.

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Star Oilco fuel delivery truck parked near Multnomah Falls Lodge in the Columbia River Gorge
Benefits of an Automatic Fuel Delivery Service 461 1024 Star Oilco

Benefits of an Automatic Fuel Delivery Service
Star Oilco fuel trucks staged for mobile on-site fueling

Benefits of an Automatic Fuel Delivery Service

Automatic Fuel Delivery Provides Convenience.

Fuel delivery services take the hassle out of managing your fuel needs. You don’t have to check your fuel levels or schedule deliveries anymore. Fuel providers monitor your usage and deliver fuel before you run out.

 

Automatic Fuel Delivery Allows More Peace of Mind.

With automatic fuel delivery, you can rest assured knowing that you will always have the fuel you need to keep your business running smoothly. This is especially important during cold weather months.

Automatic Fuel Delivery Can Provide Potential Savings.

Automatic delivery is offered by many fuel providers at a discount. A run-out charge and other emergency fees may also save you money on fuel costs. It also saves money through the time and convenience that automatic fuel delivery offers by avoiding drivers having to go off of their route to sit and wait in line to fill up their tanks. This also provides less risk on potential fuel theft. There are a variety of ways directly, and indirectly that provide cost savings for your business’ bottom line.

 

Automatic Fuel Delivery Will Help With Environmental Benefits.

Automatic fuel delivery services (or on-site fueling) can help to reduce your environmental impact by reducing the number of fuel deliveries that need to be made. As a result, emissions can be reduced and traffic congestion can be reduced. With Portland’s Climate Action Plan and their roadmap to achieve 80% reduction in carbon emissions by 2050, with 40% reduction by 2030, reducing the number of stops and idle time on the roads will reduce this number significantly. If you consider adding renewable diesel to your tanks as a drop-in solution for your trucks, then you will continue to reduce your emission’s even further.

Star Oilco diesel service truck delivering heating fuel to a snow-covered mountain cabin

Here are some additional benefits of automatic fuel delivery services: 

Priority service:

Automatic fuel delivery (or wet-hosing) customers often receive priority service during peak demand periods. This means that you are less likely to run out of fuel during cold weather or other busy times where fuel may be more difficult to get. 

Emergency service:

If you do run out of fuel, automatic delivery customers may be eligible for emergency service at a discounted rate depending on the customer and location. Seek your fuel provider for more information.

More Consistent Billing:

Budgeting your fuel costs through a payment plan system offers more consistent billing and less invoices and receipts. This allows for a cleaner paper trail for your bookkeeping. 

If you are looking for a convenient and reliable way to manage your fuel needs, automatic fuel delivery services through Star Oilco are a great option to consider. 

An automatic fuel delivery service is a service that delivers fuel to your on-site location to top off your trucks on a regular basis, without you having to schedule deliveries ahead of time. Your fuel provider will monitor your usage and deliver fuel to you before you run out on a regular basis.

Automatic fuel delivery services are available for a variety of fuels and are especially beneficial in cold weather climates, where it is important to have a reliable supply of fuel to keep your trucks running and business efficient. Automatic fuel delivery services offer a number of benefits and when it comes to fueling your fleet, your fuel provider will take care of everything for you! Contact Star Oilco to find out more about the benefits your specific business will receive through our automatic fueling services. 

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Green diesel nozzle filling off-road fuel tank labeled for ultra low sulfur diesel
Every Question About Off-Road Diesel 1024 768 Star Oilco

Every Question About Off-Road Diesel

Got questions about red dyed diesel? We have answers!

If you don’t find the answer you’re looking for related to red dyed diesel (or off-road diesel) reach out to us directly and we’d be happy to help answer your questions.

What is red diesel?

Red Diesel is off-road diesel, in the United States this fuel is denoted with a red dye. The dye marks this as fuel for off-road equipment and vehicles and as such it doesn’t have road fuel taxes included in the price.  This dye takes a great deal of clear fuel to dilute so it makes it very obvious if an on-road vehicle has been using off-road untaxed fuel. Tax authorities can and do check for vehicles using off-road red diesel in on-road vehicles. They do this by using a black light to spot any residual presence of dye in the fuel as well as at key places in the engine compartment.

What is green diesel?

On-road diesel is clear or slightly green. Refineries place a green dye into diesel fuel which is obvious if fuel is freshly dispensed into a bottle to observe its color. As fuel ages this dye fades to yellow or darker colors. Part of a visual observation to inspect diesel fuel quality is to check the fuel for a “bright” appearance with the slight green dye being a giveaway that the diesel is fresh and in good condition.

What is dyed diesel?

Nearly all diesel has dye in it. Typically when talking about dyed diesel, we’re referring to a red dye added to off-road diesel. Off-road diesel is normally used for heating oil, construction fueling, agricultural use, and other off-road equipment not used on the highway system where fuel taxes would be required by law.

comparison chart showing difference between off-road diesel and on-road diesel fuel in Portland OR

Why is diesel dyed?

Diesel is dyed in order to denote if it has paid road tax or not. On-road diesel in the United States usually has a light green tint to it. Off-road diesel has a red dye to denote it has not paid road taxes as required by all states and the Federal government.

What is off-road diesel?

Off-road diesel is diesel fuel dyed red to show it is untaxed and available only for off-road fuel uses such as construction fueling, equipment never used on a public road, agricultural use, heating oil, boiler fuel, and other non-taxed diesel fuel uses under state and Federal fuel tax law. In Oregon, with proper paperwork, some off-road uses can buy on-road fuel with the Oregon state tax exemption.

What is farm diesel?

Farm or diesel for agricultural use is off-road diesel that is not charged on-road fuel taxes. Agricultural use fuel is a tax-exempt use of diesel fuel. If diesel is burned on a farm and can be tracked for such, taxes can be avoided. Farms are allowed to receive clear diesel without road taxes charged on it in Oregon. Often it is dyed red to denote it is tax free. In Oregon, where P.U.C. for trucks over 26,000 GVW pay a weight mile tax instead of a per gallon state road tax, some farms will track their use of clear diesel so they can file for Federal road taxes on off-road usage.

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Star Oilco technician testing off-road diesel fuel quality with a funnel and filter on-site in Portland OR

What color is dyed diesel?

All diesel sold in the United States typically has some dye in it. On-road diesel usually has a slight green tint to it. This is a dye added by either the refiner or terminal provider with the fuel. Off road diesels are dyed red to denote that the fuel is untaxed and is for use in off-road purposes only.

What is the red dye used to turn off-road diesel red?

Solvent Red 26 and Solvent Red 164 are the allowed dyes prescribed by the United States Internal Revenue Service for marking diesel as for un-taxed off-road use only.

Is dyed or off-road diesel flammable?

Off-road diesel is classified as a Class II combustible liquid by the National Fire Code. A flammable fuel is one with a flash point below 100 degrees F. Diesel’s flash point is between 126 and 205 degrees F (typically assumed to be about 160 degrees F).  That classifies it as a Class II combustible.

What is the difference between off-road diesel and on-road diesel?

Fuel taxes charged is the big difference between the two fuels. All on-road diesel is clear or greenish in color to denote it is both ultra-low sulfur diesel and the on-road fuel taxes associated with using it to power a highway vehicle have been paid. Dyed fuel means that fuel taxes are not paid and that the fuel can not be used to power a vehicle on a public road.

Is off road diesel bad for a diesel pick up or heavy duty truck?

It depends on the sulfur content of the fuel and the year/engineering of the truck.  If your dyed fuel is ultra low sulfur it is typically the exact fuel as on road diesel with an added injected red dye to denote it is untaxed for off road use only.

Red Dyed fuel can occasionally be low sulfur or high sulfur content.  That sulfur content will create real issues with a  post 2007 pick up or commercial diesel truck with a tier 3 or tier 4 emission system.  Most diesel in the US today including off-road diesel is ultra low sulfur (under 15 ppm sulfur). Low sulfur diesel is over 15 parts per million and can be as high as 500 ppm.  High sulfur diesel is over 500 ppm and can range in the thousands of parts per million.  That sulfur means far more soot and black smoke out of your tail pipe.  If you are “rolling coal” out of a modern diesel that’s bad for the truck as well as violates emissions laws in the US.  Similarly if you are using a 2007 or newer truck it will have very tight tolerances on the fuel injectors which can more easily coke up if running a higher sulfur or even dirtier specification diesel.  It is recommended to use ultra low sulfur fuel in all equipment.

Why is it illegal to use off-road diesel in a pick up truck or commercial truck?

It is illegal because diesel used for on-road use has taxes to pay for those roads. These taxes are charged at a federal, state, and municipal level depending on where you are at.  Off road diesel has a red dye injected into it at the time of loading the fuel delivery truck.  This loading of a fuel truck at a terminal is the point of taxation and tracking for diesel down stream in the economy.  If you see a fuel with a red dye, it is untaxed.  To use this in an on-road vehicle if you get caught can result in huge fines. In Oregon it could be as much as $10,000 a day for use of red dyed diesel in an on road use.  It is not uncommon for scale stops of commercial tanks to flashlight a saddle tank and check for any evidence of dye in fuel at a DOT scale stop.

Is off-road diesel or dyed diesel high sulfur diesel?

Dyed diesel (or off-road diesel) can be high sulfur fuel. High sulfur diesel is defined as diesel fuel with over 500 parts per million of sulfur content.

Is off-road diesel or dyed diesel ultra-low sulfur diesel?

Off-road and dyed diesel fuels can be ultra-low sulfur but are not guaranteed to be. There has been a consistent push to reduce sulfur in all fuels in the United States as led by EPA regulation. In recent years, EPA standards require off-road construction and agricultural equipment to have an emissions system that allow ultra-low sulfur to operate without major problems. So today’s off-road diesel being delivered is ultra-low sulfur. If you have a tank with old stored dyed red diesel fuel in it, you can assume it has a higher than ultra-low sulfur content.

What is dyed ULSD fuel?

Dyed ULSD fuel is ultra-low sulfur diesel with a red dye in it to denote that it is for off-road or untaxed purposes only. These purposes are typically for heating oil, construction fuel, agricultural fuel, generator fuel or other off-road uses. The “ULSD” is an acronym for ultra-low sulfur diesel.

Is dyed diesel #1 or # 2 diesel?

Dyed diesel can be either #1 or #2 diesel. Both fuels require a red dye in them to confirm they are untaxed and cannot be used for on road fuels.

Is dyed diesel and off-road diesel kerosene?

Dyed diesel and off-road diesel can be kerosene (which crosses as #1 diesel fuel), but not necessarily. Do not assume a dyed fuel is kerosene, which is a rarer fuel. Kerosene is different than #1 diesel for one characteristic: its confirmed ability to be absorbed and taken up by a wick. All kerosene is #1 diesel.  Not all #1 diesel fuels are kerosene. The same goes for dyed diesels and off-road fuels. All dyed kerosene is dyed and off-road diesel. Not all dyed fuel is kerosene.

Is dyed diesel and off-road diesel stove oil?

Yes, dyed diesel and off-road diesel are stove oil. Typically a #1 stove oil or #2 stove oil, similar to diesel. Historically stove oils had a slightly different set of specification concerns which is why they were called “stove oils” versus diesel. When petroleum refineries distilled crude oils to get diesel range fuels, it was less exact than it is today with hydrocracking technology. Today with both oil refinery technologies and the EPA emission regulations, the number of distillate range fuel specifications is far more consolidated in order to ensure compliance with EPA and state rules. If your heating appliance is demanding stove oil, it typically needs a #1 stove oil or #1 kerosene product. This product is expected to produce less soot and therefore to work better in a pot stove type of application. The most modern stove oil appliance in the U.S. are Monitor and Toyostove thermostatically controlled direct vent heaters.

Is off-road diesel bad for my truck?

Depends on the year of your truck, and we assume you mean red dyed diesel fuel.  First, using dyed diesel, off road diesel, or heating oil in an on-road vehicle is against the law.  If you are caught in Oregon the fine can be as big as $10,000 and the State of Oregon does aggressively pursue this type of tax avoidance.  Beyond the legal use of off-road fuel.  Typically on the west coast dyed diesel is ultra low sulfur diesel. Which means it will not cause maintenance issues if burned in your engine.  Dependent on the age of the dyed fuel, or if it is actually a heating oil, it might be high sulfur or low sulfur fuel. If you use that in a post 2007 engine with a particulate trap it will have serious maintenance issues if you use that fuel.

Is dyed diesel or off-road diesel heating oil?

Yes, dyed diesel and off-road diesel are acceptably used as heating oil. Dyed diesel and off-road diesel these days are typically ultra-low sulfur diesel. Heating oil can be low sulfur or high sulfur in content under EPA and most state laws. So heating oil sometimes cannot be dyed diesel (when used for off-road equipment or agricultural use) but dyed/off-road diesel can always be used for heating oil and conform to the necessary specification required by heating oil furnaces.

Does off-road diesel have sulfur in it?

Yes! But in today’s ultra-low sulfur market, most off-road diesel is below 15 parts per million. If your equipment requires ultra-low sulfur diesel, it is a good practice to confirm that is what fuel you are getting. Some low sulfur diesel (under 500 parts per million sulfur fuel) and high sulfur diesel (over 500 parts per million sulfur) is still in the marketplace used by heating oil, boiler systems, locomotive, and marine applications.

Does off-road diesel freeze?

Off-road diesel gels at cold temperatures. At colder temperatures, wax crystals begin to form and fall out of the diesel, clogging filters and gelling up the fuel. Also, the water and naturally held-in diesel will ice up and obstruct filters. This phenomenon is called diesel gelling.

Does off-road diesel gel in cold weather?

All diesel fuels will gel if it gets cold enough. Both a formation of wax crystals and ice forming in your fuel will obstruct filters and take your equipment down. Rule of thumb: with no treatment your diesel fuel should operate without any issues above 20 degrees Fahrenheit. Below 20 degrees Fahrenheit, you will want to ensure your vendor is treating the fuel for winter use to ensure it will operate down to -20 degrees Fahrenheit.  If you are facing temperatures below that, you will want to confirm with your vendor that they are testing that fuel to operate below -20 degrees Fahrenheit.

Why does the government require diesel be dyed red?

From a informational pamphlet from the US IRS on untaxed fuel: 

“The federal government requires dyeing of untaxed diesel fuel and kerosene for two reasons. To help reduce tax evasion by identifying fuel on which excise taxes have not been paid, and to help reduce air pollution by identifying fuel not suitable for use in highway vehicles.”

Does off-road diesel go bad?

Off-road and dyed diesel do age and can go bad. All diesel fuels adhering to ASTM specification should be safe for storage up to a year without additional treatment and testing. If you are storing diesel for long term use, it is a good best practice to treat the fuel with a biocide and oxidative stabilizer to ensure that the fuel stays within specification and nothing will begin to grow in your fuel tank. The biggest enemy of long term diesel storage is water and dirt entering the fuel through a tank vent. As temperatures change a tank will breath pulling in air and moisture from outside. Ensuring there is no water in the tank and that outside contaminants can’t get into a tank are how keep your fuel within specification.

How long can I store off-road or dyed diesel in a fuel tank?

Untreated, you can assume that diesel fuel is good for a year. If treated with a biocide to prevent biological growth from growing in the tank, you can expect diesel to be good for two to three years. After two to three years, diesel begins to show age as it loses its brightness when sampled. After three years you will want to sample and test the fuel to ensure it is within specification for reliable use.

What are the fuel taxes on off-road diesel?

Fuel taxes vary by state and sometimes even local municipality. With off-road diesel, usually the only taxes to consider are sales taxes on the fuel. In Oregon there are no taxes on dyed off-road fuel. In Washington state there are sales taxes for dyed-diesel charged on top of the sale price of the fuel. (NOTE: If you use clear diesel in Washington state there is no sales tax as the road tax is being charged.)  If you are curious for a more in depth answer Star Oilco has a full explanation of Oregon Diesel Taxes (a unique system in the United States for local fuel tax collection of trucks over 26,000 GVW).

Do you pay sales tax on dyed diesel or off-road diesel in Washington state?

Yes. If you are consuming dyed diesel and are not paying for the on-road fuel taxes in Washington state, the sales tax is charged. If you use clear fuel with road taxes attached to the fuel, the sales tax is not charged. For more on Washington fuel taxes see the Washington Department of Revenue. 

What are the taxes on dyed diesel or off-road diesel in Oregon state?

Your petroleum distributor has some small taxes (under $.01) attached to the fuel they buy at the wholesale terminal level. Those taxes being the U.S. EPA Superfund cleanup and the “LUST” or Leaking Underground Storage Tank cleanup fund. Beyond that, there are no taxes (Federal, state or local municipality) on fuel used for off-road diesel in Oregon state.

Is there a way to buy clear diesel without a road tax on it?

In Oregon you can buy clear fuel exempt of Oregon’s state road taxes. The qualifications for using clear diesel Oregon State tax exempt are the following: 

vehicles issued a valid ODOT Motor Carrier permit or pass (weight receipt) 

vehicles issued a valid Use Fuel User emblem by the ODOT Fuels Tax Group 

vehicles registered to a US government agency, Oregon state agency, Oregon county or city, and displays a valid Oregon “E” plate 

vehicles, or farm tractors/equipment only incidentally operated on the highway as defined in ORS 319.520 

vehicles or equipment that are unlicensed and/or used exclusively on privately owned property 

What happens if I use dyed diesel in an on-road vehicle?

If you get caught in Oregon, a $10,000 a day fine can be levied. We have seen fuel tax cheats get caught repeatedly so be aware Oregon is on the look out for any amount of dye in the saddle tank of an on-road vehicle. If the fuel you use is low sulfur or high sulfur fuel and your vehicle has a particulate trap, you will have maintenance issues with the emission system of your vehicle.

Can you use dyed diesel in a diesel pickup truck?

Only if that pickup is dedicated to an off-road use. If you plan to ever use that truck on a public road (even to cross a street), and dyed fuel is found in that vehicle, fines up to $10,000 per occurrence can (and are) levied by state regulators. If you have a closed facility or large farm and are not registering the vehicle for on-road use (so the pickup must not leave the site), you can use off-road diesel as the vehicle’s fuel. If you have license plates and it’s permitted for on-road use, any regulator spotting dyed fuel in that truck will presume it is an on-road pickup.

How does the government test if someone used dyed diesel?

Typically when checking for illegal use of dyed fuel, regulators will sample from the tank or spin the fuel filter and observe for obvious dyed fuel. If the fuel is clear (or even slightly pink) and they suspect dyed fuel was used in the vehicle, they can apply a special black light that will glow an obvious color denoting dyed fuel had been in contact with the vehicle. They will shine that light on the filter, fuel tanks, and various parts in the engine compartment that would have come into contact with the fuel. If those areas denote even a mild trace of the red-dye used in off-road diesel, they will cite the vehicle operator. There are kits sold online for filtering dye out of fuel to remove the color.  Those kits will not remove enough dye to avoid detection by these lights.

Why is off road diesel illegal for pick up trucks to use?

Off road diesel is dyed red to show that the on-road fuel taxes are not paid or that it is a tax-free fuel.  The Federal Government and State Government’s have fuel taxes for on-road fuel usage to help pay for the roads we all drive on.  If you are using diesel for a non-road equipment, machinery, or heating/boiler applications the fuel taxes are exempt and the fuel is dyed to ensure it’s tax free status is immediately seen.  Regulators in a road side or site level inspection can also shine a black light on specific places in a vehicles system to denote if dyed fuel is being used in violation of the law as well.

What is the difference between dyed diesel and heating oil?

In the Pacific Northwest at the current moment? Usually nothing. Heating oil is dyed diesel. Most petroleum distributors are selling the mainstream dyed diesel specification for use as heating oil in order to lower the overall cost of the fuel. There are different ASTM specifications for heating oil and dyed diesel dependent on the state you buy it in. Heating oil’s specification has wider tolerances than diesel specifications as furnaces and boilers can handle dirtier, lower quality fuels than off-road equipment with a particulate trap. Heating oil is always a diesel fuel, but sometimes dyed diesel for off-road equipment has a different specification than heating oil. For example, in Oregon a 5% biodiesel or 5% renewable diesel mandate exists for any dyed diesel fuel used in off-road equipment. This biofuel mandate exempts heating oil and boilers. So heating oil can be biodiesel free but off-road diesel for equipment cannot.

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Star Oilco truck refueling off-road diesel at a job site in Portland OR

Can refrigerated trailers or “reefers” use dyed diesel even if they are attached to a truck moving it on the highway?

Yes, refrigerated trailers are off-road equipment. The diesel fueled refrigeration trailer is off-road equipment as its engine is not powering something actually driving down the road. These trailers can use any ultra-low sulfur diesel fuel (dyed or clear). If using on-road clear fuel in a refrigerated trailer, if you track and keep proof of the on-road fuel being used in the off-road piece of equipment, you can file for those fuel taxes back. Proof is required though so consult with your CPA or accountant.

How do I order off-road diesel for a construction project?

The first step is to set up an account with Star Oilco. It’s easy to pay through a simple credit application or by placing a credit card on the account. Oregon and Washington are highly regulated when it comes to fuels such as diesel. We need to account for who is ordering and getting fuel (yes, Oregon even checks sometimes as the DEQ tracks every gallon of diesel moving into the state). Determine if you want a loaner tank onsite or a keep-full service plan. Star Oilco will deliver bulk or wet hose fuel your job site on a regular schedule. We are here to make it as easy as possible for you to focus on your project, not fueling. Let us know what you want: we will keep it simple and make it easy for you.

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How do I stop biological growth in my off-road diesel fuel tank?

If you are storing off-road or dyed diesel for longer than six months you will want to make sure it is stabalized. Star Oilco recommends Valvtect Plus Six as the fuel additive you want to use.  Our recommended fuel additive is a fuel microbiocide with stability additives made for diesel long term storage.  This kills and prevents the growth of biological “hum-bugs” in your tank.  Bacteria, yeast, and algae can grow in your fuel tank. Usually in a small amount of water that collects in the bottom of the fuel storage tank (be it the bulk tank you  fuel out of or the saddle tank on your equipment).

How do I get water out of my off-road diesel equipment's fuel tank?

There are several ways to do this.  What you will want to do varies based on how much water and what it is in.  If you are dealing with a large bulk fuel tank you want to definitely pump the tank bottom to get the water out.  If you are seeing extreme biological activity (Hum-Bug growing in your tank) you want to do a kill dose treatment on that tank. It might not be a bad idea to also spend a few thousand dollars to have a professional tank cleaning company come in and manually clean the tank prior to adding the kill dose to kill anything growing in your tank.  If it’s the tank on your equipment usually the best route is to drain the tank, flush the tank, and also put a kill dose of  a fuel microbiocide to make sure nothing continues to grow.  If you want to talk to someone feel free to call Star Oilco, you do not need to be our customer for us to walk through some solutions you can do yourself. 

Where can I buy off-road diesel or dyed diesel?

There are a very few rural gas stations that provide this fuel.  Some Pacific Pride or CFN cardlock locations also have pump available for this fuel.  The easiest way to acquire this fuel is through a fuel company.  Star Oilco is one such company that can deliver dyed diesel for it’s customers, or provide cardlock cards for its customers.

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