Really depends on how you are driving in these vehicles. Ours is a V6 Eddie Bauer 4x4. My wife, who practically never goes faster than 45 around town, stop & go on side streets, only gets about 12 mpg. I drove it to work one week, 36 miles each day mostly freeway with moderate traffic and I got about 17, or about the same as my Mustang. On a trip to San Antonio, I averaged about 22-23 mpg going 60-65 fully loaded with 7 people and a loaded hitch mounted luggage rack. If I only count the steady highway driving portion of a trip (via the computer) I get about 25-26+. From my experience, the computer is about 1-1.5 mpg higher than actual since it says I used 19.4 gallons and the pump says 20.5 or so.
Really I am very impressed at how well it does compared to our previous vehicle, a Yukon XL. Not as much room, but enough for us now that my oldest is off to college.
