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Poor gas mileage

Discussion in 'E90/E91/E92/E93 (2006-2011)' started by Swooz, Aug 25, 2021.

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    So I made the mistake of getting gas about a month ago at a different gas station. My car's gas mileage dropped by about 2 MPG and engine was idling a bit rough. Used LiquiMoly fuel system cleaner and their fuel injection cleaner. Car's running much better but the MPG is still bad. Due for new plugs, passed emissions last week. Could new plugs be the ticket??

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