Diesel Exhaust Fluid

What is Diesel Exhaust Fluid (DEF)?
What is Selective Catalytic Reduction (SCR)?

Diesel Exhaust Fluid

Diesel Exhaust Fluid (DEF) is a non-hazardous solution, which is 32.5% urea and 67.5% de-ionized water. DEF is sprayed into the exhaust stream of diesel vehicles to break down dangerous NOx emissions into harmless nitrogen and water. This system is called Selective Catalytic Reduction (SCR)and can be found on 2010 and later model year trucks and many diesel pickups and SUVs. DEF is not a fuel additive and never comes into contact with diesel. It is stored in a separate tank, typically with a blue filler cap.

Selective Catalytic Reduction

SCR technology uses a catalyst system to break down dangerous NOx emissions produced by diesel engines into nitrogen and water. The chemical reactions used in SCR systems require a constant feed of ammonia gas. In automotive applications SCR delivers ammonia using a urea solution called Diesel Exhaust Fluid (DEF). DEF is sprayed into the exhaust stream by an advanced injection system and then converted into ammonia on a catalyst. The ammonia breaks down dangerous NOx emissions produced by diesel engines into nitrogen and water.

If you are operating a 2010 Diesel Model or later, you need DEF! Greg's Petroleum is a supplier of Diesel Exhaust Fluid in totes, barrels, and 2.5 gallon jugs. For further information regarding DEF regulations, restrictions, and distribution, please contact us.