Hey forgot to answer the oil question. I run glow fuel in the gas glow mix, so there is oil there, but it is totally unnecessary and unwanted actually, as the Ryobl is a wet sump engine. It does not seem to hurt anything and really never leaves any mess to speak of. If you custom mixed your fuel an in the gas/glow thread it might be better, but I fly some glow engines and I just use what I have on hand.