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Can You Improve Fuel Mileage With A Bully Dog Tuner? We Test It

Can You Improve Fuel Mileage With A Bully Dog Tuner? We Test It

Can a hand-held tuner improve fuel mileage? We wondered about that, so we put one to the test with a loaded long-haul trip.Can a hand-held tuner improve fuel mileage? We wondered about that, so we put one to the test with a loaded long-haul trip.
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