I burn E10 all summer long when the boat's in regular use. In the fall I switch over to ethanol free for the last few tanks, just so it's not sitting with ethanol in it all winter. So far, no issues going that route on an old 94. I'll do fuel lines this winter, but only because they're old and it's cheap/easy to do (not from any performance issues/problems).
Small engines and anything used infrequently, non-ethanol all the way.
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