About 18.5-9 city, 22-23 freeway, 89 octane. 2,700 miles on 3.0, 08 x5. I'm hoping it will also improve with mileage.

I decided not to wait for a diesel. There wasn't enough difference in gas mileage in the diesel, besides I read it would actually be a new engine (in order to meet CA emissions as explained in another thread and I didn't want to be an early adopter) and the cost of diesel gas is now of course out of sight.