I have had my SD now for 2 months and have covered 2000 miles...absolutely love the car. The fuel consumption is good but not fantastic I would say currently. My previous car was the 535d with the same engine. I am getting high 20's mpg at say 80 mph and probably averaging high teens around town. I would be interested to know if owners have seen their mpg improve with mileage? The engine has started to loosen up a bit more but I think needs 5000 miles at least from experience with my 535d to get the full beenfit of the engine.