In NY, 99% of gas stations sell gas with ethanol in the standard amount, but there are a few which (claim to) sell non-ethanol gas, so it must not be a legal requirement. However, I haven't tested it, so I'm not sure. I did monitor my gas mileage, and some tanks were way higher than others, so I wonder if the "non-ethanol" gas sometimes has ethanol and sometimes doesn't.
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In NY, 99% of gas stations sell gas with ethanol in the standard amount, but there are a few which (claim to) sell non-ethanol gas, so it must not be a legal requirement. However, I haven't tested it, so I'm not sure. I did monitor my gas mileage, and some tanks were way higher than others, so I wonder if the "non-ethanol" gas sometimes has ethanol and sometimes doesn't.