[ksfrogman]

The issue of the 335i's gas mileage has been brought up in previous threads. One post estimated the mpg (AT values in parentheses) to be:

city: 16(17)
highway: 35(34)
combined: 25(25)

I find this very interesting because I imagine that aftermarket superchargers (or even turbochargers) will give worse gas mileage.

I managed to get 31-33 mpg highway with my 330i GruppeM setup, and 20+ city, until forcing the air/fuel in with my lead foot. The mpg drops dramatically with aggressive driving!