I could add a little to this discussion. Premium gas has a higher OCTANE rating than regular gas. and therefore costs more. Some high performance engines have a high piston compression ratio and they NEED premium gas to prevent the "pinging" which would occur if regular gas were used. "Pinging" is hard on the pistons and for too long of a time could require a VERY costly ENGINE OVER-HALL. Most non-performance modern car engines use REGULAR gas. Using premium gas in an average engine with a relatively low compression ratio won't harm the engine, but it is just a WASTE of money. The REVERSE is NOT true. Do NOT USE regular gas in a high performance car designed for PREMIUM gas.
..........golf cars use regular OCTANE gas.
...........ethanol-free gas MIGHT (??) be better for someone that drives their cart and then lets it sit for 3 or 4 weeks at a time. The ethanol while sitting can, in some cases, form a glue-like substance with condensation and then that MIGHT clog up a fuel injector.
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