I'm just going to put this here, because I haven't seen it anywhere else (not even on bmwusa.com!):
U.S. Fuel Economy
530i
24 city / 34 highway / 27 combined mpg
530i xDrive
23 city / 33 highway / 27 combined mpg
540i
20 city / 30 highway / 24 combined mpg
540i xDrive
20 city / 29 highway / 23 combined mpg
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FWIW, my 9 year-old 2008 535xi weighs just a little less than the 540i xDrive and I regularly see 24 mpg in combined (mostly suburbs) driving. It's a shame BMW isn't really moving the needle MPG-wise on these cars. But yes, we do get more BHP for it.
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