I have a 1986 Crestliner boat with an OMC 3.0L 4 cylinder inboard/outboard engine. This has a carburetor. So far, seems to run very good. For the past year or longer, it has mainly had non-ethanol gas put in it. Can I use “regular gas” (with up to 10% ethanol in it like I put in my car) and use Marine PRO or Sea Foam Motor Treatment?