Originally Posted by tclederman
Multi-grade oil is what was recommended "in the day" (50+ years ago). I use a 20-50 to increase oil pressure at higher temperatures. Some people recommend using oil that contains ZDDP, it can't hurt (a diesel oil such as Rotella).

Rotella ???? Who woulda thunk it? Certainly an excellent oil for diesel engines (been there done that), but good for stovebolts? Heck, why not?