Thread: Shocking MPG
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      03-18-2013, 07:13 PM   #2
BillionPa
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Drives: 335i
Join Date: Feb 2013
Location: USA

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add some acetone to the fuel, 2oz per gallon of fuel in the tank in addition to whatever lubricity additive you are using, it will help clean the injector nozzles and the inside of the combustion chambers

Also, check air filter