between 14 and 15 mpg for me on my 650xi Gran Coupe.
Pretty much in Sport mode most of the time...some manual shifting and start/stop is always off!
Tried driving a little more conservatively but lasted about 5 minutes!
I'll do longer highway stretches in comfort+ mode which gives good gas mileage but the moment I get back on the accelerator the average drops pretty quickly!! lol
This car is very much like my 4.8is X5 in terms of gas consumption...my last 535xi was very gas efficient in contrast to the 650i....but neither was this much fun