If you track your fuel economy, try different brands and give each two or three fill-ups to see if there is a noticeable difference that can't be explained by weather or unusual driving patterns. You might find that the cheaper … This may not be a problem with some cars, but if you have a newer car with direct injection, many owners have experienced serious and expensive problems from using cheap gasoline due to carbon buildup. Really this comes down to: Do you want … …

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Can Cheap Gasoline Hurt Your Engine? – Automotive News – Cars …