DEF
Time to add DEF to my duramax, anyone ever use the "Supertech" DEF from Wal mart? I usually use Peak Blue DEF. Any thoughts?
Forum Discussion
You would think DEF is DEF and they all need to follow a standard recipe for making it, but some folks in the previous company I worked for had problems using cheaper DEF and were told not to. Maybe it was made from Canadian or Chinese mice urine?? :)
