Just did a run from Colorado to California and back and averaged 26.1 averaging almost 80 on the highway and of course less in the city. Over 20k on it and still enjoying it.

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2011 x5 35d - Delivery Feb 28, 2011
Platimun Gray/Oyster Nevada Leather; Dark Bamboo Wood Trim; Cold Weather Pkg; Premium Pkg; Premium Sound Pkg; Rear Climate Pkg; Technology Pkg; Comfort Access; Multi-Contour Seats; Heated Rear Seats; Head Up Display; Roof Rails; Space Saver Spare Tire

2011 Infiniti G37x
Premium Package; Navigation Package; Interior Accents

2009 335i xDrive (Gone but not forgotten)
Sapphire Black/Oyster Nevada Leather
Cold Weather, Comfort Access, Logic7, Navigation