Sdrive23i 2.5 manual here in Scotland..
Claimed average combined cycle is 33.2mpg (imperial).
Short journeys with 'enthusiastic' driving I get around 22mpg imp.. Motorway (our freeway) I get around 30mpg imp which is not too bad... Sometimes a little more in the summer.. But just today I filled up on the way to work and tried an economy drive on the motorway... Average to work and back I got 37mpg imp!! But, it was bloody boring!