SilverFusion2010
Thread starter
Yes and you know what that means, right? Especially in light of the earlier statement "however, higher viscosity engine oils are required for satisfactory lubrication in hot weather".
No engine is damaged by any SAE grade higher than what is allowed, unless the winter rating is so inappropriate for the starting conditions that it cannot be pumped. Oils that are too thin at operating temperature can cause damage but no SAE grade is too thick.
And as far as the API certification, that is a minimum requirement.
I live in N FL. No such thing as too thick at start here unless it's some severely oxidized used oil