The boat forums are all over ethanol. Very bad stuff. Can eat away older fiberglass fuel tanks inside large yachts and fill the bilge with gasoline. And small engine manufacturers are totally against it. You would think there would be a lobby trying to get this crap taken out.

My 6.3 ran like crap, ethanol made it run at least 10% too lean and the mechanical injection pumps have no way to adjust. I would expect CIS has the same problem.

Almost all manufacturers of marine engines have stated that if ethanol goes over 10% it will void ALL engine warranties.

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MB-less