Over 12,000 i've averaged 13.4 miles with about 60% city 40% highway but a lot of stop and go highway. On pure highway miles at about 75 mph I can get 20 mpg. It really is not much worse than my 2008 4.8 and about the same as my Cayenne GTS. Well worth the cost now but gas is cheap....

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2013 BMW X5 M