^^^ yeah, rotella is a Shell product. theres a few guys that use it. 10w30 would be my guess. me, myself, i dont use motor oil. i use what B7 said, ATF Type F. its made for wet clutches. the color makes for easy recognition in contamination determinations and its lightweight, which means less mass to slow down moving components. ive used it for 20+ years in all my rides where a wet clutch is present.