A little rain and the fact that school is back in session, increasing traffic, reduced the displayed mileage to 34.7MPG. Still quite a high number for a 18/27 car. The real bummer came at fill up time. The display was off even farther this time. Calculated mileage was 31.5MPG making the display off by a full 10% this time. I think cutting the car off completely and coasting screws up the display more than when I was leaving the car on. Still I beat the EPA highway by 16.6%