Am considering one of two oils, one is Amsoil (high zddp) and Redline (high moly) This is going into a 2003 Moto Guzzi that specs 5w40. It is engine only, dry clutch, no starter clutches. It has the new hydraulic valvetrain that is hard on cam lobes and follorers (non roller). I was wondering in respect of the cam which would give best barrier film protection, zddp or moly? thanks.