Mine does 80mpg motorways 69 mpg combined by the book. The motorway one is not far off that in reality, the combined is probably nearer 55. The only thing two things to think about with a bmw, are they are very undignified getting in and out of, and never ever erver drive one in the snow, bar that best car I've ever had.
Wish I could get near those figures. I don't do many miles though. On a recent run to Scotland, I averaged 27 mpg.