After wanting one for about 20 years, I am finally getting a 12 valve Cummins-1995 with about 175K on it. Right now I am just stockpiling all my WATF while Diesel is comparatively cheap. I know it is not going to stay down forever. Question is--how do those engines like WMO? To be specific, when I was running it ,it was mostly WATF with about 20% rug, then that about 50/50 with D2. At that rate, for one thing, my supply and usage were about equal. Anything I should know about the Cummins? Thanks I was going to put a tranny in the 6.2, and add a turbo, but for now am not going to do anything with it for a while-- after I retire and move, may have time and desire to mess with it.