I just filled up for the 50th time since purchasing the car in early May. I've obsessively recorded a lot of data for those gas station visits.
My over-all gas mileage has been just over 44.5 mpg, but it's clumb up in recent months from about 42 mpg (fillups 1-20) to about 46 mpg (the 30 next fillups).
I've averaged putting in 7.1 gallons per fillup. My avg gas cost has been $4.03, tho this will be quickly dropping now that I can fill up in Joisey for under 3-and-a-quarter! I've also avg'ed driving 315 miles between fillups, with a few tanks of 400+ miles.