I am planning on purchasing some Amsoil 4-stroke Marine 10W-30 oil for $2 a quart today from someone locally and wanted to know if this would be alright to use in a Honda GCV160 lawnmower? I see no reason why oil for a 4-stroke marine application would not suit a small air-cooled 4-stroke lawnmower engine, but maybe I am missing something. To me it seems like it would be a very robust oil. The Honda recommends 5W-30 or 10W-30, if I remember right. It does not require synthetic or anything special. Any thoughts/advice would be appreciated!