2015 Ford Mustang GT Long-Term Road Test

Edmunds.com

Since the last update two months ago, we've logged another 3,000 miles, but it had no affect on the results. I had bets on the lifetime average taking a nosedive because of the performance upgrades and the way they encourage more spirited driving.

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daryleason

Has any other Edmunds vehicle been approximately 20 percent off of it's EPA fuel economy ratings? At least on the negative side. Although vehicles that exceeded their EPA would be interesting to know about as well.

bankerdanny

Why hasn't anyone taken it on a longer trip? And since nobody has, why doesn't someone take it out to say Vegas and back. based on posts here it seems like someone from Edmunds is in Vegas at least one a month, so it shouldn't be hard to find a candidate.

bankerdanny

daryleason said:

Has any other Edmunds vehicle been approximately 20 percent off of it's EPA fuel economy ratings? At least on the negative side. Although vehicles that exceeded their EPA would be interesting to know about as well.

Keep in mind that this car has an optional lower geared rear end. The EPA rating is based on a version that turns less RPM's at any given speed.

sxty8stang

bankerdanny said:

daryleason said:

Has any other Edmunds vehicle been approximately 20 percent off of it's EPA fuel economy ratings? At least on the negative side. Although vehicles that exceeded their EPA would be interesting to know about as well.

Keep in mind that this car has an optional lower geared rear end. The EPA rating is based on a version that turns less RPM's at any given speed.

Yep - on the 2011-2014 cars, having the 3.73 gears (like this car has) versus the standard 3.31s seems to take off 4-5 MPG. My 2011 GT with 3.31s averages 23.5 overall, consistently for 92,000 miles now.