Elma S., Mexico, N.Y.

Yes. In areas that are required to sell oxygenated gas, there will be ethanol regardless of the octane rating. That includes most major cities year-round and some states that have high levels of carbon monoxide during the winter.

Federal regulations allow a gas blend that includes up to 10 percent ethanol (E10), though some areas restrict it to lower amounts. Don’t know what the rule is up in Mexico (N.Y.), but the amount that can be used locally is supposed to be posted on each gas pump.


Parts of the country with good air quality — mainly rural and other sparsely populated areas — may not be required to have ethanol in the gasoline, but local refiners may not produce pure gas just for those areas, so you may not have much choice about using ethanol.

All vehicles sold in the U.S. are equipped and guaranteed to safely run on gasoline blended with up to 10 percent ethanol. If you’re concerned about the effects of ethanol on your car, you can find ethanol-free pumps at www.pure-gas.org.

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Answered by Rick Popely on July 19, 2010 | Permalink

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