I'm returning an average of 33mpg over the last 1000 miles with a mixture of 50% motorway driving and about 30% town driving with the remainder A roads in my e91 330d auto pre LCI. Have only had the car a fortnight and compared to my previous 525d manual e39 it seems to be about 11mpg down with the same trips and driving style
The power of the e91 compared to the previous e39 and e46 diesels is incredible though!