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
When I had my 05 duramax, I always added a quart of 2 stroke oil on every fill up. Truck ran much smoother and was more quiet. Never had any issues. I would not, however, use it on the newer diesels with the DPF.
