DEF (Diesel Exhaust Fluid)

Call our Petroleum team at 800.598.6827 to get quotes on delivery of DEF (Diesel Exhaust Fluid) in bulk quantities or 55 gallon drums.  If you just need a few gallons, Wilco does provide smaller packages available in any of the fifteen farm stores throughout Oregon and Washington.

For those who purchase a lot of DEF, we encourage you to call and talk with us about our bulk delivery programs.  Wilco will provide a bulk DEF storage tote for your use; with an option to include a pump.  The storage totes come in 275 or 330 gallon storage containers.  Suitable storage bulk tanks allow us to deliver to your door at bulk prices.


DEF Diagram

What is DEF?

Diesel Exhaust Fluid (DEF) is a urea based fluid designed specifically for use in SCR (Selective Catalytic Reduction) systems to reduce NOx emissions.  Simply put, DEF is the solution to reduce truck / tractor emissions to meet the new EPA standards.

DEF is API certified and meets ISO22241 specifications.  DEF is non-toxic, non-flammable, colorless, non-hazardous, and very easy to use.  It is used in all diesel trucks and tractors that were manufactured in 2010 or later and have an SCR system.

How much DEF do I need, or will I use?

The newer vehicles require DEF in order to operate.  It’s critical to read your owner’s manual which will give specific details for your tractor, truck or the diesel equipment you’re operating.  That information will help you better understand how often you’ll need to refill DEF.  Generally speaking, DEF consumption is expected to be approximately 2% of fuel consumption, depending on vehicle operation, duty cycle, geography, load ratings, etc…


The video below provides additional detail on how the SCR systems work, more about DEF and the quality of what we have available to deliver.