For what it's worth, I'm getting about 15 mpg in mixed driving so far with my 05 X and I'm actually pretty happy with that. Once I get the engine broke in, I expect it to go up considerably. That's just the nature of a new car and having to put some miles on it. At this point, it's pretty much impossible to know what the gas mileage is going to be since no one has had the new X long enough to really break it in yet.