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Reply to "Does type of gas impact MPG?"
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[quote=Anonymous]What do you mean by fuel type? Octane? Shell vs chevron? Ethanol containing or ethanol free? The only one that could make a big difference is ethanol. Ethanol provides less energy than gasoline, so if you used a blended fuel, that could translate into the neighborhood of 5% lower fuel efficiency. Octane could make a difference if you were in a car designed for a higher octane, but not as much as 5%. More like 1%. And I don’t know for sure, but I don’t think gas brands make much of a difference. Maybe you used a fuel with 10% ethanol first and then ethanol free later. [/quote]
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