Yeah, it's a turbo. And 28 is only good in this rig for winter mileage.
I don't burn it up like I used to- MPG numbers are harder to get and more satisfying than shaving a few seconds off my commute and leaving chaos i in my wake. It's also immensely entertaining to get these numbers in a car that isn't meant to get them- that's why I care more about my % over EPA rating than much else. My dream is a tankful at over 35 mpg in everyday driving.
Wait till late next summer. Once you've got more time under your belt and the weather's on your side, I'll bet 27 will be your floor, not your ceiling. And all the while with all that GO under your foot for whenever you want it.