Fuel Economy Update for January - 2015 Ford Mustang GT Long-Term Road Test

Edmunds.comEdmunds.com Member, Administrator, Moderator Posts: 10,316
edited February 2015 in Ford
imageFuel Economy Update for January - 2015 Ford Mustang GT Long-Term Road Test

Edmunds.com updates the fuel economy of its 2015 Ford Mustang GT. Not a shocker: it's thirsty.

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  • subatomicsubatomic Member Posts: 140
    I have noticed an incremental improvement in observed fuel economy for my cars when I switched from conventional motor oil to a top of the line full synthetic (my favorite being Pennzoil Ultra). I am curious to know what motor oil is being used in the Mustang. A better motor oil might further reduce internal mechanical friction and contribute to slightly better fuel economy.
  • boffboff Member Posts: 91
    Did this include your test track time? Looks like you'll get close to the EPA city in city driving and EPA highway in highway driving. That's what I've been getting, and since most of my driving is city, my average of almost 17 mpg over 2500 miles seems about right.
  • sxty8stangsxty8stang Member Posts: 58
    @subatomic, it's Motorcraft Semi-Synthetic 5W-20.

    I am continually amazed by how bad the mileage is for you guys. You too @boff. I've had my '11 GT (3.31 gears, manual) for 3.5 years, driven it 60,000 miles and never, ever had a tank worse than 18.3 MPG. Overall average of 22.9.
  • karbuffkarbuff Member Posts: 34
    Well, when it's not your car and more importantly, not your gas, you'll tend to wear out the carpet under the accelerator pedal a little more. If we all drove our personal cars like we stole them (standard test procedures) we'd fare no better in the MPG category.
  • js06gvjs06gv Member Posts: 460
    My '11 GT automatic with the standard 3.15 rear axle consistently got 19-20 in mostly city driving. The '15 GT automatic that replaced it has the optional 3.55 axle and is struggling to get 17 with the same driving patterns. I did notice that while the EPA highway rating is the same between both cars at 25, the new car's city rating dropped by 2 to 16, so I guess with less than 2,000 miles on the clock I'm right where I should be. I'll say though that the '11 was one of the few cars I've owned that would always beat the EPA city rating.

    2024 Ram 1500 Longhorn, 2019 Jeep Wrangler Rubicon, 2019 Ford Mustang GT Premium, 2016 Kia Optima SX, 2000 Pontiac Trans Am WS6

  • mikesanto70mikesanto70 Member Posts: 2
    JS06GV....how are those 3.55 gears compared to 3.15 as far as acceleration?
  • mikesanto70mikesanto70 Member Posts: 2
    karbuff said:

    Well, when it's not your car and more importantly, not your gas, you'll tend to wear out the carpet under the accelerator pedal a little more. If we all drove our personal cars like we stole them (standard test procedures) we'd fare no better in the MPG category.

    karbuff said:

    Well, when it's not your car and more importantly, not your gas, you'll tend to wear out the carpet under the accelerator pedal a little more. If we all drove our personal cars like we stole them (standard test procedures) we'd fare no better in the MPG category.

    JS06GV....how are those 3.55 gears compared to 3.15 as far as acceleration?
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