Originally Posted by seville
My GT has about 1,200 miles and no matter how much I baby the throttle, I'm getting mixed hwy/city (60/40) of 17MPG; it may go down to the 16 range sooner or later.
1. How many miles should I have in my car before I can hopefully notice an improvement in MPG?
1. OR should this be all I'm getting?
** I have a 14' GT auto - O/R xpipe, CAI, Bama 93 Street tune, and GT500 axles.**
This may not be relevant but, a friend has the Bama tune and his pipes stay black all the time. I expect the tune is killing his mileage. I have a factory tuned '14 GT/TP with Airaid CAI, Heartthrob Flowpack axlebacks and 2,300 miles on the clock. My little piss-stop of a town is riddled with stop lights and signs, so my city driving is at 35mph and below. I get nearly 14mpg in town and have gotten as high as 24mpg on the interstate. But, I rarely try to drive economically or hold my speed down. I hold no faith in the belief that mileage will increase as time goes on. Didn't happen on my '07 GT and I don't believe my '14 will be any different.