Likewise with me.... add gas when needed and keep going!! lol But after 5000 miles on our 650i Coupe about 15mpg around town and we did a road trip this summer about 300 miles each way and surprisingly got 26mpg round trip!!! Now, if you're like Southern22 and leave the car in sport mode, (it does sound sweet!!) you'll get less!!
Let's face it........ none of us bought these beauties for the great gas milage...lol lol