I have a Honda Shadow 750 motorcycle (V twin) that I am considering putting Shell Rotella in. Rotella is a group III oil right? Also, I heard something about it being paraffin based and can gum up things sometimes. Sounds like [censored] to me but I was wondering if there is any truth to that. If not Rotella, I plan on going with Mobil 1 Racing 4T in 10w40.