If you're running long drains I'd highly consider Amsoil/Mobil 1. After 30 some thousand posts I still am unsure of Redline, going back and forth. I don't think it is as long drain capable as M1/Amsoil. In fact I know it's not. Won't resist oxidation as well as the other two. If oils aren't subjected to the tests in the video edyvw posted, I'd be a bit hesitant. I've seen great results from UOA's posted with Red Line in some engines, and some that made me wonder if this oil was just formulated in Roy's basement.