Diesel Exhaust Fluid (DEF) Delivery & Service in Portland, OR and Vancouver, WA
Reliable DEF Supply for Fleets, Construction, and Businesses
Star Oilco provides bulk Diesel Exhaust Fluid (DEF) delivery and packaged DEF solutions for fleets, construction companies, and businesses throughout the Portland metro area. Whether you operate a single truck or manage an entire fleet, we make it simple to keep your equipment compliant and running smoothly.
As emissions standards become stricter, DEF is essential for all diesel engines equipped with Selective Catalytic Reduction (SCR) technology. Without DEF, your trucks and equipment won’t run at full power — or worse, may be forced to shut down. That’s why our customers trust Star Oilco for on-time, local DEF delivery and dependable service.
Diesel Exhaust Fluid (DEF) is a non-toxic solution made from urea and deionized water. It works with your diesel engine’s SCR system to reduce harmful nitrogen oxide (NOx) emissions, helping your business meet environmental regulations and keep vehicles operating efficiently.
-
Required for all 2010 and newer diesel engines with SCR.
-
Consumed at about 2–3% of diesel fuel usage (for every 100 gallons of diesel, expect to use 2–3 gallons of DEF).
-
Prevents costly downtime by keeping your fleet in compliance.
-
Under Oregon’s Diesel Retrofit Compliance Program (HB 2007), certain older diesel trucks in Clackamas, Multnomah, and Washington counties cannot be titled or registered unless they are retrofitted with approved emissions-control technology. Since SCR systems (requiring DEF) are among the technologies used to reduce NOx emissions, failure to maintain DEF or SCR systems may render a vehicle non-compliant.
-
Starting January 1, 2025, the state enforced stricter restrictions: for example, a medium-duty truck with a model year 2009 (or older) engine must be retrofitted to be titled in the Portland metro area.
-
Other programs, like Portland’s Clean Air Construction (CAC) initiative, require that construction equipment and on-road diesel vehicles used for public projects meet emission standards and may need working SCR/DEF systems.
DEF TOTES – WE KEEP THEM FULL
Star Oilco makes DEF simple with our tote delivery program. The hassle-free solution for fleets that need reliable supply. We deliver 275-gallon DEF totes directly to your site, complete with a dispensing nozzle and electronic tank monitor. That means no guesswork, no mess and no downtime.
With Star Oilco’s monitoring service, your tote is automatically tracked and refilled before you ever run low. Our team keeps your DEF topped off on a schedule that fits your operation, so you never have to worry about ordering, storage, or running out.
For fleets of all sizes, our DEF tote delivery with automatic refills is the easiest and most dependable way to keep your trucks on the road and in compliance.
Why Choose Star Oilco for DEF?
-
DEF Bulk Tank Monitor – We provide a Bulk Tank Monitor in your DEF Tote to always keep your tote FULL.
-
Reliable Delivery – You can count on us to keep your DEF tanks full.
-
Fleet & Construction Expertise – We work with transportation companies, contractors, and small businesses daily.
- Electric Dispensing Pump – We loan an electric dispensing pump with the tote to our bulk DEF customers to help clean up that DEF dispensing set up.
-
Complete Fueling Partner – From DEF to diesel and gasoline delivery, Star Oilco is your one-stop solution.
Service Areas
We proudly deliver DEF across the Portland, OR metro area, including:
-
Portland, OR
-
Beaverton, OR
-
Tigard, OR
-
Hillsboro, OR
-
Gresham, OR
-
Vancouver, WA
-
Salem, OR
- Ridgefield, OR
- Camas, OR
- McMinnville, OR
- Estacada, OR
- Molala, OR
- And surrounding cities within 50 miles
Frequently Asked Questions About DEF
DEF should be stored in a cool, dry place out of direct sunlight. Bulk storage tanks from Star Oilco include proper dispensing systems to prevent contamination.
Your diesel engine will lose power and may shut down. That’s why Star Oilco provides scheduled delivery to ensure you never run out.
Yes, DEF has a shelf life of about one year if stored properly. Star Oilco rotates supply to ensure freshness and performance.
No. DEF must be stored in clean, dedicated containers or totes made for DEF use. Using the wrong container can cause contamination and damage to your SCR system. That’s why Star Oilco provides 275-gallon DEF totes with proper dispensing equipment to protect your fleet.
Yes, DEF begins to freeze at 12°F (-11°C). This won’t harm the fluid, but it must be thawed before use. Star Oilco’s DEF totes and equipment are designed to handle seasonal conditions in the Pacific Northwest, and our delivery schedule ensures you always have usable product on hand.
With Star Oilco’s tank monitoring service, you don’t have to worry about reordering. Our system automatically alerts us when your tote is running low, and we schedule delivery to keep you topped off so your fleet never runs out.
No. DEF is non-toxic, non-flammable, and safe to handle. It’s essentially a mix of urea and deionized water. While it isn’t hazardous, it can corrode some metals, so it’s important to use proper storage tanks, totes, and dispensing equipment designed for DEF.
Contaminated DEF can damage your SCR system, cause costly repairs, and even put your vehicle out of compliance. Contamination can happen if DEF is stored in the wrong container or exposed to dirt and debris. Star Oilco’s sealed totes and clean dispensing equipment ensure your DEF supply stays pure and reliable.
Contact Star Oilco for DEF Delivery
Ready to simplify your DEF supply? Let Star Oilco deliver bulk DEF, packaged DEF, and storage solutions directly to your business.
Star Oilco is keeping Portland’s fleets running with reliable DEF delivery and service.