Diesel Exhaust Fluid (DEF)

What is DEF?

To answer that question we need to go start back in 1999 when the EPA launched the National Clean Diesel Campaign (NCDC).  In 1999 diesel exhaust was implicated to increase the risk of lung cancer and respitory disease. Trucks and busses comprise 28% of the Nitrogen Oxides (NOX) and are 20% of the Particulate Matter (PM) from U.S. mobile source emissions. The plan was to over eleven years to reduce diesel emmissions.

Begining in 2009 Light Duty Tier 2 (Silverados, F-250 and Ram pickups) requiring the use of SCR technology requiring the use of DEF. Heavy-duty diesel highway vehicles began the requirement for vehicles manufactured after Jan, 1 2010 requiring the use of DEF. All other off-road farming & construction equipment, railroad engines and marine vessels will be fully phased in by 2017.

DEF is essentially a solution of UREA and primarily water used to reduce NOX emissions in diesel vehicles to near zero the result being a very clean diesel.

Western States Oil supplies Diesel Exhaust Fluid, otherwise known as DEF. We provide DEF in bulk, drum and tote quantities and the product is available for pick up or delivery. We have arranged ample supply through an agreement with one of the nation’s largest DEF suppliers TerraCair to assure that our customers are able to easily meet the emission requirements.

Click here for a Product Spec Sheet for Terracair DEF.

For larger fleets we can assist you in setting up a DEF dispensing unit at your facility. For more information please call our office at 800-743-6950.