Mine has approximately 4500 miles on it and is averaging exactly 21 mpg from when I took delivery. My driving consists of about 70% city 30% highway. I don't beat it all the time, but do let is loose quite often. I do think if I drove it like a normal car then it would be getting 23 mpg, but then why would I want a Mustang"
2014 GT Premium / Deep Impact Blue / 6 speed / 401A-Charcoal and Cashmere / Comfort Pkg / Sec and Rear Sensing Pkg / 19" Mach Alum Wheels / 3.73