When did DEF become required ?
Thinking of upgrading to a DP. I want to avoid having to deal with DEF. What year models did it become a requirement ?
Forum Discussion
Other than the ULSD issue in Mexico, the newer motors have some advantages. Dealing with DEF isn't really a big deal. Every so often you pour some in. It's fairly cheap, both in cost to purchase and in cost per mile. Heck, you already do that with windshield washer fluid.
