sell you X and buy anpother vehicle. Plain and simple, they are NOT known for getting good mpg's. They are designed as arodynamic as a brick, and live up to it. YOu can try to read as much as you want, but no one has really come up with the big answer to this one.
You can try changing to synthetics, makeing sure your tires and inflated properly, keeping it tuned up properly, take your air dam off the top, and drive with your windows up, You MIGHT be able to get an extra mile or two per gallon out of it that way. Or be happy that you dont have mine, I get 14mpg NO MATTER WHAT, unless I am in 4WD, then it gets worse.