Fortunately, or unfortunately, I put a lot of miles on my car but mostly on the weekends. I live in central NJ, drive north to Vermont near Killington or to New York State near Whiteface or Gore to ski. Second week I had the car, drove up to Conn to see an Aerosmith Concert. Yep, I do put a lot of miles on my cars. Fortunately, I can walk to the train station to get into manhattan.
As far as gas consumption, I origionally thought the trip computer was off but I am getting, driving at a steady 70mph about 30mpg. All I do is take my time getting up to speed and just sit back. I did notice a drop in mileage when I put the 4 snow tires on and that loss was about 2mpg. Since I put the snow tires on at 2500miles and I just turned 7000, it is hard to tell if breaking the motor in has helped. I do use Mobil 1 and in my opinion, that makes a difference.