When I drive on the fwy a long distance, I get thous type of mpg. When mix with city, it drops down to 17-18 mpg.
Question is how to get city driving to 20+mpg.
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2005 BMW 645ci - DPE 3pc Forged Rims, Coilovers, Britalman full cat-back exhaust system, , K&N Air Filter, LUMMA Roof & Trunk Spoiler.