After reading some of the post about oil types. I see that there are some running Honda Synthetic oil in there bikes. I run Valolin 30 weight in my bike. I was told some years ago, can't remember by whom that Synthetic oil would cause the clutch to slip. Has anyone experienced any problems using Synthetic. I use Synthetic in my F-150, and would use Synthetic in my bike. I know that it cuts down on friction between metal parts. Can someone convince me that it is safe to use. Oil change due soon.