When you have a vehicle the size of what we drive, getting 20+ mpg at 80+ mpg, GM is doing something right. I love when people refer to the Suburban or Tahoe as a gas hog, are they ever out of the loop, i know there are situations when you can be a hog. City driving can put a real dent in mileage and winter driving as well. My own average is 9.4 liters to 100km sometimes less but not by much and sometimes more. I do average 850km to a tank which is over 500miles (17 Suburban). I had a 19 company explorer and it did not even come close to the mileage this gets and nowhere near the inside room. This vehicle had the non turbo 3.5. Appearances can be deceiving.