I'm a cheap lazy *******. I dump 5 gals of RUG in the processing drum, and fill with WMO from multiple various sources. Might be 15W-40, might be 5W-30 might be ATF I don't know, it's all black and oily. In the winter I forgot to switch tanks and had to pull start the truck a couple of times. If I burn the IP, engine, and transmission up tomorrow doing it the way i do it, I'll have already payed for the whole truck in my fuel savings. Don't give a rats ass about smoke, as long as it starts, runs and drives without missing and stuttering, I'll run it. I don't worry about percents, I don't worry about EGT, or anything else, except for detonation. Once it got cold, and I was running almost pure 15w-40 it kept tripping the filter light and stumbling after a hard acceleration. Pulled up to the gas pump and dumped 7 Gallons of RUG in it and took off, figured if it was too much, i'd suck it out and go again. It quit stumbling, and ran great and started easy on that mix, I guess it was something like 65/35 mix maybe a 60/40 the tank was almost pure oil and I dumped 7 gals RUG on top, the tank holds 19, or 20, can't remember. I live out in the sticks, and folks are used to seeing old raggedy farms trucks smokin like a train, so mine fits right in with the rest. When i replace the old IDI with a PSD, or a Cummins, then I might care, and little more about smoke and percentages, but now I don't. PS, mine always smokes, but not too bad as long as I keep the RPMS down. when I actually look in the mirror at the pipes seems like it smokes worse on pure diesel.
