Currently getting 27mpg average WITH fixed roof rails and a mountain bike on the roof. ~2000 miles on the odo. I'm gonna get rid of the roof rack for the bike and get a hitch mount soon, till then I'll be using my old saris trunk rack, so I think that will improve fuel economy a bit further too. I've gotten 29 mpg mixed city/highway on a manual, so under optimal conditions, if driven properly with no crap on the roof, this car is actually relatively efficient. The problem I have is if you drive it aggressively a lot, that fuel economy plummets (I guess that's the same with any car). A bit of hard acceleration here and there doesn't hurt it much though, maybe by 1 to 1.5mpg overall on a tank.