joe_pumaExplorerMar 25, 2016DEFTime to add DEF to my duramax, anyone ever use the "Supertech" DEF from Wal mart? I usually use Peak Blue DEF. Any thoughts?
APTExplorerMar 25, 2016Supertech DEF from Walmart is the cheapest bottled DEF, only slightly more than pump costs per gallon. I have used it for about 25k miles without issues.
