If there is pinging/knocking with regular gas there is something mechanically wrong with your golf cart. These are low compression engines and 87 octane is plenty of octane. I did try one tankful of ethanol free when we first got our cart and it made no noticeable difference. If you are noticing a difference with ethanol free gas you may want to consider having your cart checked out.
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Originally Posted by photo1902
It was noticeably quieter once we began using Ethanol free versus regular gas which we used for the first three fill ups or so. We were even considering taking it in for a pinging/knocking noise which was hard to pinpoint. Nothing to do with insulation.
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