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mileage

  1. please help with gas mileage problem

    SPI Performance (2000-2004)
    When I first got my Focus it had 34,000 miles on it and it got 330 miles to the tank in the summertime. Now it has 103,000 miles on it and in this winter it is getting 250 miles to the tank. I've recently replaced the fuel filter, spark plugs, wires, and pcv valve and i have an open cone air...
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