I have virtually the same car but an 05. I have about 20K on the clock and am getting 21.2 City and 26.8 Highway. I suspect your mileage will improve as you put miles on it but the main criteria is that you have got to stop driving like an "old man". We' re mostly all "old men", we just don't have to drive like it. Go on, push it over to over 130, there's plenty of pedal left. You bought it to go fast didn't you? Or just to look good???
Doc