My average so far has been between 35 - 39 mpg per tank on the dash board, but after fill up I realize it is actually about 33 - 36 mpg.

I live in New York City and since the temperature started getting colder my FE has reduced by about 2 - 3 mpg. I do believe I'll be getting a better FE in the warmer weather cos I've experimented and learnt a few tips on how to drive a TCH "properly."