2008 BMW 3 Series 335xi 4dr Sedan AWD (3.0L 6cyl Turbo 6M)
Gas mileage on long trips (Pgh to DC and back) is 30 mpg (average over 10 trips, 29 one way, 31 the other)! All is well except for nav system and iDrive and their integration, and no spare. Get a Garmin instead of BMW nav system which is a Navtec base. Garmin says "In 500 ft make a rt on route 123 South" - if you use the Australian lady enunciation. Navtec says "make the next right". Garmin shows road names on perspective view, Navtec doesn't. iDrive requires too many actions for usage, and interupts other audio as it drones out it's directions. Also, I plan to replace RFTs with GFTs when they wear out and lug a spare around in the trunk.
Mileage, performance, design, handling OK - I hope it will improve when I replace RFTs.
Add a spare, hire an American SW company to do the iDrive GUI, jettison Navtec and use Garmin instead. Warranty is subpar - should be 100K miles / 7 yrs all parts for extra small cost.