Offical F30 USA MPG ratings from
www.fueleconomy.gov
2012 F30 328i 8-speed auto: 24 city / 36 highway.
2012 F30 335i 8-speed auto: 23 city /33 highway.
2012 F30 328i Manual: 23 city / 34 highway.
2012 F30 335i Manual: 20 city / 30 highway.
http://www.fueleconomy.gov/feg/Find....n=sbs&id=32175
http://www.fueleconomy.gov/feg/Find....n=sbs&id=32177