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07/02/2008
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Although there are practical steps car owners can take to increase gas mileage, your BBB warns consumers to be wary of gas-saving claims for automotive devices or oil and gas additives. While some of the gas-saving products have been proven to work, the savings are small, at best. What’s more, you could end up with serious engine problems or a voided manufacturer warranty by adding after-market devices to your engine.
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