DEF Mileage
4-25-2015. For anyone who is interested - I just posted an update on page 3 with my latest mpg after just refilling the DEF tank yesterday. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++...
Forum Discussion
I add it when it needs it and could care less how much it uses. It makes for a powerful, no stinking truck that can pull anything I want to.
