As far as running wmo as an addative only, what quantity would someone run? Quart?? Gallon?? At this point I'm not lookin to scrounge up oil from everywhere to run thru this thing....I'm just wonderin if that 3 gallons I dumped on Saturday would be worthwhile like ps/mmo, 2-stroke, or some other addative

 

It was a while back, but I thought I read on a Cummins website that they recommended nothing more than 5% for waste oil.