[Kiernan]

I'm still running my car in (should hit 1,000 miles this weekend) but I think the economy is pretty good for what it is - a heavy 4x4 with quite a bluff fronty end. I'm only using the car for communiting at the moment (around 8 miles each way) and I'm currently returning around 38mpg. I expect it will improve over time, but for how I use the car, anything over 40mpg will be a miracle.

This is on a 20d Manual MSport running on 19" run flats. I've never turned the A/C off either, and have only played with the ECO PRO mode a couple of times just to see what it does - not a lot is the answer other than to dull the throttle reponse and reduce the effectiveness of the heater.

As you can see from my signature, I also have an M3 and that does just over 20mpg however I drive it, so the economy in the X3 is brilliant in comparison!