Truths vs. myths about how to save on gas
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FICTION: Use a do-it-yourself fuel additive
We've heard of everything from acetone to mothballs to WD-40 being added to the gas, and though some users claim a modest increase in mileage, the additives can cost more than any gas savings can justify. Plus, good luck in getting manufacturers to honor any warranty claims if they learn you have been using unauthorized additives.