Hey, I've been using a oil from a big equipment place for several months with what I would guess is probably a bunch of hydrolic oil. My thoughts are it's too thick, so make sure you thin it. I'm not super scientific in my filtering and I don't have a centerfuge, so take all I say with a grain of salt and a teaspoon of honey, but it's clogged up a handful of fuel filters. But I'm quick to point out it does burn, and a fuel filter on rockauto is cheaper than a gallon of diesel. I want ATF, I think it'll burn cleaner. I like motor oil the best, I think my truck runs best on motor oil reeaaallllll smooooothhh....