Thread: Significant Gas Mileage Increase after an annual service
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      05-25-2018, 09:29 PM   #10
najnad
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Drives: 11 X3 35i M-sport
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What was the service, besides oil change? Fuel filter? Fuel injector cleaning? new spark plugs? New air filter? New O2 sensors?

Doing a manual calculation of mpg is best to determine if the computer is accurate or not.
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