If you're concerned about MPGs, a GT Mustang with the PP is not the car for you.
Seriously, I get about 14MPGs in city driving in my 2012 Brembo GT. They get terrible MPGs, so if it's a concern, don't get one.
2012 GT Premium, Brembo PP, MT82, 3.73s, Blk/Blk. Bama 93R, Koni Yellow Rear Shocks, Hawk Ceramic pads, Luxurious & Plush Floor Mats