If you run construction equipment, generators, farm machinery, pumps, or other diesel-powered equipment in Oregon, you may be able to use dyed diesel.
You may also hear it called off-road diesel or red diesel.
The important thing to understand is that dyed diesel is not meant for just any diesel-powered vehicle. Whether you can legally use it depends on where and how the fuel is being used.
In Oregon, diesel used to power vehicles traveling on public roads is generally subject to fuel taxes. Dyed diesel is intended for qualifying off-road and other nontaxable uses.
What Is Dyed Diesel?
Dyed diesel is diesel fuel that contains a red dye to identify it as fuel intended for qualifying nontaxable uses.
The red color does not mean the fuel is completely different from regular diesel. The dye is there so regulators can tell the difference between fuel sold for qualifying off-road use and clear diesel intended for highway vehicles.
You may also hear dyed diesel called:
- Red diesel
- Off-road diesel
- Dyed off-road diesel
- Dyed fuel
- Non-highway diesel
For Oregon businesses, the most important question is not simply what kind of equipment you own. What matters is how that equipment is being used.
Why Is Dyed Diesel Red?
The red dye makes the fuel easy to identify.
Federal fuel-tax rules require qualifying untaxed diesel to contain dye so regulators can distinguish it from fuel intended for taxable highway use. That is why using dyed diesel in a highway vehicle is not simply a matter of trying to save money on fuel.
If fuel is inspected, the red dye can show that dyed diesel was placed in a vehicle or tank where it may not legally belong.
Who Can Legally Use Dyed Diesel in Oregon?
Dyed diesel is commonly used in equipment that operates off public roads or is used for another qualifying nontaxable purpose.
Some of the most common examples include construction equipment, generators, agricultural machinery, industrial equipment, and other stationary diesel-powered equipment.
Stationary and backup generators are another common use for dyed diesel.
Examples include:
- Emergency generators
- Commercial backup generators
- Construction-site generators
- Temporary power systems
- Data and communications facilities
Because generators use diesel to produce electricity rather than move a vehicle down a public road, they can generally qualify for dyed diesel.
Construction companies are some of the biggest users of dyed diesel.
Common equipment includes:
- Excavators
- Bulldozers
- Loaders
- Cranes
- Pavers
- Compressors
- Skid steers
- Trenchers
- Other non-highway construction equipment
If the equipment is working on a jobsite and is not being used as a normal highway vehicle, dyed diesel may be the right fuel.
Star Oilco regularly provides diesel fueling for construction projects throughout the Portland area, including direct-to-equipment fueling and onsite fuel tanks.
Many types of farm equipment may also qualify for dyed diesel.
Examples include:
- Tractors
- Combines
- Harvesting equipment
- Irrigation equipment
- Other agricultural machinery
Oregon also has specific rules for certain farm tractors and implements of husbandry that may occasionally travel on public roads.
If your farm equipment regularly travels on public roads, it is a good idea to check the current Oregon rules before deciding which fuel to use.
Many industrial businesses use diesel engines that never operate as normal highway vehicles.
Examples can include:
- Pumps
- Compressors
- Stationary engines
- Material-handling equipment
- Industrial machinery
- Certain yard equipment
These types of applications may be able to use dyed diesel when they meet the requirements for nontaxable use.
Diesel is also used for some heating systems and other stationary applications.
Again, the main issue is how the fuel is being used. Dyed diesel must be used for a qualifying purpose and should not be treated as a cheaper alternative to highway diesel.
What Happens If You Use Dyed Diesel Illegally?
Using dyed diesel for a taxable highway purpose can result in serious penalties.
Federal penalties for knowingly misusing dyed diesel can start at the greater of $1,000 or $10 per gallon of fuel involved, depending on the situation.
Additional taxes and penalties may also apply.
For a business, the potential savings from illegally using dyed diesel in highway vehicles are nowhere near worth the risk.
A good rule for your employees is simple:
Use dyed diesel in qualifying off-road equipment and clear diesel in vehicles that operate on public roads.
Businesses that use both types of fuel should also have a clear fueling process so employees know which fuel belongs in which piece of equipment.
Can You Use Dyed Diesel in a Truck in Oregon?
The short answer is that you should not put dyed diesel into a normal truck that is being driven on public roads.
That includes work trucks.
Just because a pickup or service truck belongs to a construction company, farm, or industrial business does not automatically mean it can use dyed diesel.
A simple way to think about it is:
Excavator working on a construction site:
Dyed diesel may be appropriate.
Pickup truck driving employees to the construction site:
Highway diesel rules apply.
Stationary generator at the jobsite:
Dyed diesel may be appropriate.
Dump truck driving on Oregon public highways:
Highway diesel rules apply.
A construction company can easily need both dyed diesel and clear diesel on the same jobsite.
Can Equipment Using Dyed Diesel Ever Cross a Public Road?
Sometimes the answer is more complicated than a simple yes or no.
Certain pieces of equipment may occasionally cross or travel a short distance on a public road without being treated the same way as a normal highway vehicle.
Oregon has specific rules covering certain farm tractors and implements of husbandry that are only occasionally operated or moved over public highways.
That does not mean every piece of off-road equipment can travel on public roads while using dyed diesel.
If your equipment regularly operates on public roads, or you are not sure whether your situation qualifies, check with the Oregon Department of Transportation or a qualified tax professional before using dyed fuel.
Is Dyed Diesel Cheaper Than Clear Diesel in Oregon?
Usually, yes.
Dyed diesel is often less expensive because certain highway-related fuel taxes do not apply when the fuel is being used for a qualifying purpose.
The actual price difference will depend on current fuel prices, taxes, delivery location, fuel specifications, and the amount of fuel being delivered.
For companies that use large amounts of diesel in off-road equipment, the savings can add up quickly.
The important part is making sure the equipment actually qualifies for dyed diesel.
In the quest for a greener future, renewable diesel has firmly taken the lead. Its remarkable reduction in emissions, better fuel economy, and seamless integration into existing diesel infrastructure make it the go-to choice for heavy-duty truck operators. While standard biodiesel has made commendable progress in reducing emissions, renewable diesel emerges as the winner in the arena of cleaner and more efficient fuels.
The studies quoted in this blog are just the tip of the iceberg, illustrating the overwhelming evidence in favor of renewable diesel. As we move forward in our pursuit of sustainable transportation, it’s clear that renewable diesel will play a pivotal role in driving us toward a cleaner, more environmentally friendly tomorrow.
Is Dyed Diesel the Same as Off-Road Diesel?
In everyday conversation, yes.
The terms dyed diesel, red diesel, and off-road diesel are commonly used to describe diesel fuel that has been dyed red and is intended for qualifying nontaxable uses.
That said, there can still be differences between the actual fuel products available.
Depending on your operation, you may need to think about:
- Diesel grade
- Biodiesel content
- Renewable diesel content
- Seasonal treatment
- Cold-weather performance
- Storage
- Additives
- Equipment requirements
If you are buying fuel in bulk, it is worth talking with your supplier about both the legal use of the fuel and the type of diesel that makes the most sense for your equipment.
In the quest for a greener future, renewable diesel has firmly taken the lead. Its remarkable reduction in emissions, better fuel economy, and seamless integration into existing diesel infrastructure make it the go-to choice for heavy-duty truck operators. While standard biodiesel has made commendable progress in reducing emissions, renewable diesel emerges as the winner in the arena of cleaner and more efficient fuels.
The studies quoted in this blog are just the tip of the iceberg, illustrating the overwhelming evidence in favor of renewable diesel. As we move forward in our pursuit of sustainable transportation, it’s clear that renewable diesel will play a pivotal role in driving us toward a cleaner, more environmentally friendly tomorrow.
Do I Need a Permit to Buy Dyed Diesel in Oregon?
It depends on what your business is doing with the fuel.
Oregon has different fuel-tax rules for fuel users, sellers, dealers, distributors, and other businesses involved in the fuel supply chain.
A contractor buying dyed diesel for equipment at a jobsite is not necessarily subject to the same requirements as a company that distributes or resells fuel.
If you are unsure whether your business needs a license, registration, or specific tax reporting, check with the Oregon Department of Transportation Fuels Tax Group or your tax professional.
How Should Businesses Keep Dyed and Clear Diesel Separate?
If your company uses both highway vehicles and off-road equipment, it is important to keep your fueling process organized.
A few simple steps can help:
- Clearly label dyed-diesel storage tanks
- Clearly label pumps and dispensing equipment
- Train employees on which equipment can use dyed diesel
- Keep delivery and fueling records
- Separate dyed and clear diesel tanks when possible
- Limit access to onsite fuel
- Work with a fuel supplier that understands commercial and construction fueling
These steps can help prevent accidental misfueling and make it easier for employees to know which fuel they should be using.
Star Oilco supplies businesses throughout the Portland metro area with dyed off-road diesel and commercial fuel delivery.
We fuel construction sites, generators, industrial equipment, and bulk fuel tanks. We also work with businesses that need both dyed diesel for equipment and clear diesel for highway vehicles.
If you need fuel delivered directly into your equipment or want an onsite fuel tank for an ongoing project, we can help set up a fueling plan that fits the way your operation works.
Need Dyed Diesel for Your Oregon Operation?
Not sure whether your equipment should be using dyed diesel or clear diesel? Talk with Star Oilco about what you are fueling, where the equipment operates, and how much diesel you use.
Common Questions About Dyed Diesel in Oregon
Yes, qualifying construction equipment operating off public roads can generally use dyed diesel. Excavators, loaders, generators, and similar jobsite equipment are common examples.
If the pickup is being driven on public roads, you generally should not use dyed diesel in it. A work truck is still a highway vehicle when it is traveling on public roads.
Yes. Stationary and backup generators are common uses for dyed diesel because the fuel is being used to produce power rather than propel a highway vehicle.
Yes, qualifying agricultural and off-road farm equipment can use dyed diesel. Some situations involving farm equipment traveling on public roads have additional rules, so it is worth checking current Oregon requirements if you are unsure.
No. In this context, red diesel is simply another common name for dyed diesel.
Often, but private property by itself is not the only thing that determines whether the fuel qualifies.
The type of equipment and how it is being used also matter. If a vehicle operates both on private property and public roads, it is a good idea to confirm the rules before using dyed diesel.
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This page provides general information about dyed diesel and fuel-tax rules. It is not tax or legal advice. Rules can depend on the specific equipment and how it is being used. For questions about your specific situation, consult current Oregon Department of Transportation guidance, IRS guidance, or a qualified tax professional.