We made the trip, again, today and I drove, never hit the brakes and got almost 20 mpg in 211 miles. So driving habits have a lot to do with mileage. His Envoy has just under 40k miles and he has had the brakes done twice and has been told that he's got less than 20 percent left on the current set. Oh, and something else, I put some air in the tires before the trip, set them at 36psi. They were all below 30 and one was 22. He's not too involved in what's going on with his driving or his maintenance and he's paying the price. This is his second set of tires and he did not know that tires have air pressure and did not know that you have them rotated every now and then. I don't think you'll find him lurking arount bitog any time, soon. At least he has learned a couple of things, including the fact that the engine has six cylinders and a hood release.