Rdriver

The place I get my oil changed only stocks 5w-30 Amsoil. Will it hurt anything to use this, or should I have them order 10w-30?????


Thanks

Gernby

I hear a lot of people do this, but I don't. It might be good to run it in really cold climates, but I wouldn't want to run it any other time.

Rdriver

Thanks

twohoos

I've been running 5-30 synthetic for 20K miles, since my first oil change at 2800. The subject has been argued here exhaustively, with many different opinions. The argument for heavier oils seems to be one of film strength under high-rpm conditions... the counter argument is that synthetics have orders of magnitude greater film strength that conventional oil. (In fact, that's the reason you're not supposed to use synthetics till the engine is fully broken in -- the extreme strength of the oil will actually prevent break-in!) So I see Honda's 10-30 recommendation as being a conservative one based on lowest-common-denominator dino juice, but unnecessary for synthetics.