DEF Shelf Life!
Just a quick tip for those that are new to Diesels with all of the newer emission controls. DEF apparently has a shelf life and using anything other than DEF bought from the dealer may void your warr...
Forum Discussion
Oh and P.S. I never intended this thread to be a Ford vs GM vs Dodge battle. Just wanted to pass on my recent experience with DEF and what I learned from 2 different dealerships about GM's warranty as it pertains to Duramax emissions control system so others on here would have some info.
