Here we go with the mpgs again. I just got 372 miles out of 17.8 gallons, that's 20.9 mpg. It was 40% interstate (95 from Richmond to DC) 40% non interstate highways and 20% city. It's all stock with 60K on her.

Everyone here knows the X has the aerodynamics of a brick. If you go over 70 they will slurp down the gas. I'm not usually in a hurry so I rarely stomp or even apply "rapid pressure" to the throttle. If you don't mind getting 13-15 mpg, go ahead and give her the gas, it's your choice. I can't speak for the S/Cs, but the regular Xs can do better, I consistently get 19 or so. The worst thing I get is an occasional "granny" comment from a lead footed passenger.
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"The meek shall inherit the Earth.... The rest of us will go to the stars."