There does seem to be quite a following of Rotella, lots of the touing bikes guys are using it. I'm not there yet, but curious. For the moment I'm on M1 Mx4T 10-40 or 4T Racing as its called now. -Really I think it comes down to - as long as you change your oil at resonable intervals, there is no bad oil. -- BTW I went to the local QSL bike night and there was a funny drag car in the parking lot. Guess what oil they are using? Yeah - Rotella..