[/quote] Just think what would happen if someone were to use BMW oil, or much worst Harley oil? We might have a nuclear melt down! [/quote]

Actually Harley oil is pretty good stuff. Their dino oil has an excellent additives package and works well in all motorcycle engines. The new SYN 20w50 is probably one of the most heat tolerant oils out there. I have my doubts about running it in every lubrication application on the motorcycle though, even if Harley says you can do it. (BTW as Harleys are belt drive, there is no data as to how this would work on a rear drive unit )