roccocaiazza

My 2009 911S (997.2) around town gas mileage has gone from 15 to 12 in the last month. Car runs great with no performance issues. Oil consumption is normal and have 30K on 40K spark plugs. Just put BKK fuel injector cleaner in gas. Any ideas?

krazykarl

Tire pressures OK? If they're down it can increase rolling resistance and reduce mileage.

roccocaiazza

Tire pressure good. Total mileage 72000

da Vinci Dan

Have you changed shift points? My mileage suffers when i shift at higher reves more frequently. I have begun to shift now between 4-5k rpms. Shifting is just better there and the car seems to like being driven that way. Fuel mileage suffers

alfetta

My .2 S MT gets about 13-15 in city driving. I tried shifting when the shift light tells me and I averaged about 17 MPG city driving, the EPA estimate. (but boring!) I think the MPG goes to driving style.