I am a new owner and going to bump this thread up. I drive either: 59 miles, mostly expressway, or 51 miles, no expressway. After 1 drive of each, my mileage was about the same, around 54 MPG. The difference is that the night I took the shorter slower drive, it was 12 degrees with a much lower wind chill, and my battery lasted about 2/3 as long. FYI, I did 70 mph on the expressway, which is about 50 of the 59 trip. Also, they do have chargers at work, which was a real selling point for me.