I have a stick shift 2001 bmw 330ci. My gas mileage decreased from refilling my tank at rough 420 miles to 350 miles. The only thing that I have changed is the rims which I upgraded from 17s to 18inch rims with 245/40/18 tires. I wanted to ask is could the rims cause that much of difference in mileage per tank or is it something else? Like spark plugs? Fuel filter. Anything I can do to bring up my gas mileage per tank? Thanks
have the same problem?
Monday, May 14th, 2007 AT 12:02 PM