Dover mike
Club Member
Good afternoon I have a question just going to service HD and said the engine transmission and transfer are all the same oil screaming eagle 20w-50 is that correct as I would have thought transmission would be a gearbox oil
Yes. Same oil in all 3 holes. Works for me.Amsoil recommends 20W-50 synthetic V-twin motorcycle oil in the engine, transmission and primary chaincase on most Harleys