This oil is pretty solid, but has definitely become a go-to for wishful thinkers and folks who have not faced the truth that their engine is clapped out. Go ahead and use it, but we need to get off the idea that it does more than clean up old engines a little bit. Also, need to call out folks who are suggesting that they should use it on brand new cars. That makes no sense, and, in fact there are better, cheaper oils holding manufacturer specifications readily available. The product has its place, for sure, but also seems to have folks drinking the Kool Ade.