When did DEF become required in diesel engines?
When did DEF become required in diesel engines? 2008 When Commercial Fuel Services Started Including DEF Come 2008, the EPA mandated that all three-quarter-ton and larger trucks had diesel particulate filters installed. Do all diesel engines need DEF? A: Because almost all diesel-powered passenger cars and trucks built since 2010 are equipped with Selective Catalytic Reduction (SCR) and require Diesel Exhaust Fluid (DEF), it is readily available at most fueling stations and automotive parts retail stores. Truck stops often have a DEF pump right on the fuel island. What to do if your Ford PowerStroke has a DEF system fault?...