As I mentioned in another thread, now that I started to use my 528ix "normally" (after the short break-in period), my average is even higher at 9.4 l/100km. This is 10% city, 90% outside - of which less than half is motorways (up to 200, but usually 160-180 kmh), more than half- regular single line roads with heavy traffic (lots of overtaking with full acceleration; 140km/h).
So, it's more or less the same as my good old I6 330i would take; the only comfort being that the F10 is considerably heavier, so the N54 I had in the E46 would probably need more that that....
PS. The other advantage is of course what I mentioned in this thread's OP - the N20 F10 is at least 25% less expensive here, than otherwise identical F10 with over the 2.0l engine stroke.
previous: 2003 E46 330i SMG
current: 2013 F10 528i xDrive
Last edited by MoldCAD; 02-15-2013 at 02:52 AM.