My 2014 V6 has approximately 500 miles on it. I get around 18 mpg around town and yesterday I got 31.7 on the highway. I'm running an Airaid CAI and a Bama 87 Performance tune with 89 octane gas.
Actually, it's my 3rd Mustang since 1971. This one was brand new last Tuesday. I live in Florida and Ohio, depending on the time of year. I hope to pick up some tips and learn from this forum.
Take care, Ted