Agree with the driving styles comments... I learned many years ago to accelerate quickly but not agressively, don't tailgate and know where the stops are going to be. Not only does it help with the gas mileage but it does wonders on saving on brakes. A few vehicles back, I was able to go 75K on my explorer before the brakes needed replacing...
With the TDI, I lucked out and hit a sweet-spot with my commute. I'm averaging 39mph (speed) on my commute of 25 miles (one-way) that will vary between 25mph and 45/55mph depending on the exact route I take that day. the tdi loves the rolling hills. Some days I have exactly 2 stops (signs) the entire way.
With the lack of summer here in NewEngland, not needing to run the AC very often certainly has help keep my mpg up. It will be interesting to see what my averages do in real summer weather in the future.
If you've been a TDI follower you will know that there was quite a controversy when the inital 2009 TDI EPA numbers were finally made public. This was around 15 months (or so) ago... I've got one of the first 09 units and have been running it for 50weeks now and am really happy I waited for it and bought into the believe that they had to be better....
__________________
|