I use a 10-40 oil though. I use havoline which is auto oil but it does not have the energy conserving additives. I have never had clutch slip and aside from an occasional hard shift or me not shifting all the way 
I have never had clutch or tranny issues.
I also use havoline auto but 20/50. Never had any problems. Tried mobile one once in the race bike and didnt notice any improvement in times. Just made the gaskets leak more but knew that would happen. As for cam starving on the 650s there is a pocket of oil under the cam that gives it some lube. Also unless the engine has been sitting a long time most everything still has a coating of oil on it. Now it you hit 9 grand the secound it fires there would be a problem.
Terry
