I have a 92 Cummins and recently began running waste motor oil.....I started putting about 10 percent right in the tank and just driving and all was good.......I got a tank for the back of the bed so I could more easily manage the mixture and stepped up to about 35 percent......at that point I started getting quite a bit of smoke...............not at freeway speeds but at idle and when accelerating up to speed............the truck is runnig fantastic..better that on ULSD only....but smoke is bothersome....
Any ideas????help???
Any ideas????help???