I suspect it is too early for F25 owners to have real numbers. There will be break-in periods before they get those real numbers.

E70 35i models, broken in, combined city/highway, are getting 21 mpg (US) real world. Move up or down from there based on more or less highway.

http://www.xoutpost.com/bmw-sav-foru...ctual-mpg.html

Same engine in my 535i does a real world 24 mpg (US) city, 29 mpg highway (US).

I would think the F25 should be able to split the E70/535i numbers, once broken in.

__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue