TRUEGARD Premium Diesel Exhaust Fluid DEF - 55 Gallon Drum

DEF is required by diesel engines equipped with Selective Catalytic Reduction (SCR) emissions systems, which are common on medium- and heavy-duty trucks manufactured to meet modern emissions standards. On these vehicles, DEF is stored in a dedicated tank located next to the fuel tank on the driver's side, with tank capacities typically ranging from 6 to 23 gallons depending on the truck's application.

DEF is injected into the SCR system's exhaust stream, where it chemically converts harmful Nitrogen Oxide (NOx) emissions into harmless water vapor and nitrogen - natural components of the air. Because the SCR system handles NOx reduction in the aftertreatment stage, the engine can be tuned for better combustion efficiency, which is why engine manufacturers report that SCR combined with DEF improves overall fuel economy by approximately 5% compared to competing emissions technologies while achieving NOx reductions in excess of 90%.

Yes, TRUEGARD DEF is a non-hazardous urea solution, so it does not require the same handling precautions as hazardous chemicals. It is not flammable or classified as a dangerous good, making bulk storage in a 55-gallon drum practical in a typical fleet or commercial facility.

Diesel truck DEF tanks typically range from 6 to 23 gallons depending on the application, so a 55-gallon drum provides roughly 2 to 9 full tank refills. High-mileage or multi-truck fleet operations will naturally deplete the drum faster, making the bulk drum format most economical for fleets with consistent, ongoing DEF consumption.

If your delivery location requires a liftgate to unload the 55-gallon drum from the carrier's truck, there may be an additional $75 liftgate charge. To avoid this fee, ensure you have a loading dock, forklift, or other means of unloading a heavy drum at your delivery address.

No - DEF must never be mixed with diesel fuel, additives, or any other substance. It is stored and dispensed from its own dedicated tank on the vehicle, completely separate from the fuel system. Contaminating DEF can damage the SCR system, so it should always be stored in its original or dedicated clean containers.