I did expect to get better than my now consistent 13.5 mpg, because I trusted the newly revised EPA rating system that rates the AWD at 15 city. Yes, you might say how silly of me to trust the EPA ratings, and my response is that I matched the old EPA ratings on my previous car- a very economical volvo v40 wagon. I also match the EPA ratings of my other car, a 2004 M3- and both of these other cars were rated using the old EPA rating system. As many of you know, the new EPA system of 2008 is more accurate, with lower mileage numbers, than the old system. So if I have always been able to match the more optimistic EPA ratings on my other cars, then yes, I assumed that I would be able to match the EPA rating of my new CX-9.
That being said, I think I know why I am getting only 13.5 mpg...
When I accelerated briskly in my lighter cars, it didn't use that much extra gas. To get my CX-9 to match the acceleration that I am used to in a 3300 lb. vehicle, it must use almost twice as much fuel to accelerate the 4600 pound CX-9. I simply need to learn to be much lighter on the throttle. Some of you claim you are no feather-foot, and you still get somewhere inside the EPA ratings, but you may also have a driving pattern that takes you on some long stretches where you get to use overdrive. The kind of driving I do in the CX-9 is 75% light to light, therefore I rarely get into 5th and 6th gear.