ok I had read something on here about loosing compression and other bad things when using a synthetic in the motor. I returned a whole bunch of redline to a store here and almost got chased out of the store for believing it may do more harm than good "what do you think they put in airplane engines, it's what I use in my motorcycle" other than the fact that it doesn't break down what's the point? I mean I change my oil almost as much as my underwear so the fact that it goes for 50k means nothing to me.