We also just got rid of our 2006 RX400h (mother-in-law now has it) where we were getting 24.5-25.5 mpg. I'm at 24 mpg in our X5d so far for the fist 400 miles. I don't drive like a grandma, but I do keep it under 3,500 rpms for break-in. And there is plenty of power down there, no need to rev too high in this beast.

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*2010 X5d - Space Gray/Black Nevada/Dark Bamboo|ZPP|ZAP|ZCW|ZTP|ZRC|322|328|386|4NC|4UB|655 |6FL
~Ordered 8/27; Production began 9/28 at 12:20pm; Completed 10/7; Delivered 11/4!~
*2008 535i Black/Black - Dinan Exhaust & S2 Software
*1995 318ti Clubsport - Hellrot Red (autocross/fun car!)
Past: 2005 X3 3.0i; 2009 335xi