For me I kind of think it's best to stick with the sea foam...it's good for anything, marine or auto either one....every now and then I'll put a can in both mine and my wife's Chevy's...Guys at the counter always tell me the same thing, Sea Foam is the strongest stuff on the market. Plus using only one product lessens the amount of various types of stuff sitting on the shelf in the garage. Also I'm not sure every parts house sells Yamaha Ring Free....do they?
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