It's possible. My z06 gets 26mpg on the highway, but if I go even slightly down hill it reads 29-30. The computer read 25.6 when I manually calculated 26.02, so if the 370z owners commute or the one time he measured it was a few degrees down hill I can see an honest 36 mpg. I measure my mileage coming and going over the same stretch of road to average out the UPS and downs for this reason.
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