Marvel Mystery Oil
Any one ever add this to fuel in your diesel trucks? The only reason I ask is my 07 Duramax developed a light surging at idle. Researching the issue it is a fairly common problem especially with tr...
Forum Discussion
If your 2007 was the classic you could get away with dumping "home remedies" in the tank. However I see your truck is the 2007.5 with the lmm motor, and as gmc6000 pointed out you need to be much more careful with a dpf equipped truck. Opti-lube would be my vote as well.
