I was on the NYS Thruway doing about 72-75, cruise control off (as they say to do for the first 500 miles or whatever), keeping up with traffic. I try to be reasonably light on the gas pedal. 28.5 mpg sounds about right, for mixed driving. That's around what I was getting in my '12 Si, according to the i-Mid/Nav info. Strictly highway, I usually get between 32 and 36ish. I've never gotten below 25mpg, even with snow tires! I actually drove a 2013 Civic EX Sedan (Auto tranny) for about a month, between the '12 Si and buying the '13 Si. I was averaging around 26-27 mpg in that. I was really unhappy with that, plus the fact that it could barely make it uphill without downshifting 2 gears. That's when I decided just to get another Si. You can't beat the power/mpg of this car. It's unreal! Not to mention, it's fun to drive haha