I tried doing searches for the science behind this, or at least to come up with a summary explanation. There was a lot of science, not much explanation that a non-mechanic would understand.
But what I did find is a general "concept" of the gas needs: using ethanol-free gas may add another year to the life of your engine, assuming you follow up on all the other recommended maintenance, oil changes, belt replacements, tire inflation settings, and so on.
But if you plan on replacing your gas cart in just a dozen years after it was manufactured, then that year won't make any difference to you. These engines are built to last 20 years or more.
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