I saw the stang on TV the other night. I was laughing, typical performance mods always increase economy. Lots of people don't realize that. My 91 GT got 27mpg regularly, and my 91 Civic Si gets 32 combined and 40+ on highway trips. Of course, it did do 12mpg on streets of willow, but that was fun.
I really need to get back down to the Q and do some autocrossing again.