I got my green 2007 on 9/12/2007. Most of the time I crawl in New York City in short distances; Other times I went to Phillie twice, just to break in my car and test the real highway mileage.

New York City is the worst in North America. In worst cases, I got 23 MPG in a slower than walk trip. But even that mileage is better than regular cars' highway real mileage.

My actual numbers: City 37 to 39 MPG; Hwy 51 no matter what speed) according to the computer. I should add: Rural 64 MPG (<41 MPH)

My manual calculation when I pump up (tank full to tank full) is 5 MPG lower than the computer calculated MPG. This is the biggest thing!!!