Eric, I think that you (and other Fit owners who bought in the cooler months) might be noticing the effect of summer-blend gasoline which seems to be more efficient than the winter mix. No doubt the colder temperatures in the northeast play a part as well, but I believe you can go further on a tank of gas in the summertime because of the composition of the petrol (e.g. our highway range in the winter is about 300 miles, in the summer 330 or more). And yes, the interior space and folding seats are awesome.