Your commute is your problem. I get 65-70mpg in my insight, but when I used to work 6 miles from home, I would struggle to get 50 WITH a kill switch and pulse and gliding. Go for a 300 mile cruise on the freeway at 70mph. Fill up at a gas station, drive 150 miles, turn around and come back, then fill at same station, same pump. Guarantee you will be at 40 or better. My civic had knockoff tires, old plugs and distributor, and old oil and I still got 38-42 depending on driving habits.
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