DEF Math
The owner's manual says my truck has a 5.5 gal DEF tank. I waited until I was down to 1/4 on the gauge, just above the red zone, and added a 2.5 gal box of Blue DEF from Advance Auto. Now the gauge ...
Forum Discussion
What we learned in the class 8 world is high EGT's (power demand) result in increased NOx emission which = increased DEF use. In a working class 8 truck that was around 1-2% DEF vs fuel.
If I owned a DEF using pickup I would measure in some DEF fills at the pumps vs fuel used and soon have a rate vs fuel use vs work we are doing today factor to know when to fill the DEF tank.
If I messed up and needed some emergency like, I know all heavy truck and equipment dealers who sell current emissions engines are required by law to stock DEF - truck dealers, ag dealers, and likely yellow construction equipment now too. They are often located along main highways.
That would be the day I would exit a trip and drive around looking for a shopping plaza or China parts store to buy DEF in a cardboard box down aisle 300.
If I owned a DEF using pickup I would measure in some DEF fills at the pumps vs fuel used and soon have a rate vs fuel use vs work we are doing today factor to know when to fill the DEF tank.
If I messed up and needed some emergency like, I know all heavy truck and equipment dealers who sell current emissions engines are required by law to stock DEF - truck dealers, ag dealers, and likely yellow construction equipment now too. They are often located along main highways.
That would be the day I would exit a trip and drive around looking for a shopping plaza or China parts store to buy DEF in a cardboard box down aisle 300.
