RE: ASP 4-stroke run in
G'day,
When all else fails read the destructions. If you really feel you must Castrol R is about the best castor around. However............if you check with the agent I think you will find that Brian Winche's 20% Coolpower Blue, 10% Nitro and 70% Methanol will not void the warranty and you don't have the gumming effect of castor. Still if you have a lean run castor does protect better at extreme temps.
Seriously e-mail Brian as I think he is the service agent for ASP.
Cheers,
Colin