I have an old (1982) Ironhead Harley. While servicing it I came across a synthetic oil meant for VWs with a double wet clutch gearbox. As the gearbox and clutch share the same oil I thought it might be worth giving it a try. The oil that came out was Harley 80/90 dynosaur juice, This oil seems t make the bike easier to get into neutral at idle. Shift quality is the same. Anybody any thoughts on this experiment?