It seems as if the X6M gets better mileage. I have had three trips of 1000 miles where I averaged 17 mpg for the entire trip according to the computer when I returned. And this is with periods of high speeds and going up the sides of a mountain. I can't understand how it is possible to get 12 mpg with these vehicles, unless you are using fuel that has a lot of alcohol in it, which I do not recommend!
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