They call it motorcycle oil for a reason. Bikes need good quality oil that has good shear strength and additives for a wet clutch. (I think two of the differences are, or used to be, phosphorus for bike clutches and moly for car oil) I use, and have always used 10-w40 Mobil One Synthetic in all of my bikes with no problems and lots of miles. Some people do have great luck with car oil, (but why risk it?)
Safe riding!
Safe riding!
