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 used oil analysis posted with Red Line in some engines, and some that made me wonder if this oil was just formulated in Roy's basement.