Fuel tank size is listed in the manual as 14 gallons however even if i almost empty it (computer shows 10-12 miles left) i still cannot get more than 12.8 gallons when refuel. i tried different gas station but result is the same. i doubt that my tank size is smaller than spec but maybe computer setting is off so it shows lower fuel level. anybody experienced similar problem?

also i can only do 24.5 mpg on highway commute (about 50 miles each trip) which is way below 28 mpg spec. car only has 1400 miles on it so i hope mileage will be better once the engine is broken in. my previous 325Ci was averaging 27-28 mpg on the same route. any comments?