I'm looking for more sludge busting detergent than modern mineral oil intended for gas engines. The Valvoline bottle is an all-fleet (gas, diesel, natural gas), but the Rotella is just diesel. I assume that the Rotella has more Zddp, making it a diesel-cat only compliant, but my 40 has no cat converter, so it should be good to go, but, I don't really know.
Opinions?
Opinions?