Might be some truth in there DougD, like everything about these
oil discussions theres some controversy no matter which way you go.
I've heard of several people having problems with their motorcycle clutch when using some
synthetic auto type
oil, it allows TO much slipping. My Burgman has an independant trans from the engine, I use diesel Shell Rotella in both the engine and trans for my application. I DON'T use STP in the bike, but I've been thinking about it...