Fuel Economy Update for March - 2012 Jeep Wrangler Long-Term Road Test

2012 Jeep Wrangler Long-Term Road Test

2012 Jeep Wrangler Sport: Fuel Economy Update for March

April 9, 2013

2012 Jeep Wrangler Sport

By now our 2012 Jeep Wrangler Sport's fuel economy has become fairly stable. Some 31,000 miles will do that to MPG data.

It's fuel economy hasn't quite lived up to EPA estimates, but tall, wide and sticky 285/70R17 BFGoodrich Mud Terrain T/A KM2 tires have not done on-road gearing, inertia or rolling resistance any favors for the last 25,000 miles. And then there's the 3-inch lift kit and the extra aerodynamic turbulence and increased frontal area it brings to the party.

March was dominated by two off-road trips, one to northeastern Arizona and another to Moab, Utah. Such trips are an odd combination of long stretches of highway cruising followed by short bouts of low-speed crawling in low range. These trips and a smidge of commuting in between added 3,822 miles to the Jeep's odometer at an average fuel consumption of 16.5 mpg.

I guess off road use isn't all that bad for the average if you drive hundreds of freeway miles to get there.

Dan Edmunds, Director of Vehicle Testing @ 31,415 miles

Average Lifetime MPG: 16.3 (17.3 before mods / 16.0 after)
EPA MPG Rating (City/Highway/Combined): 17/21/18
Best Fill MPG: 21.0 (19.0 after mods)
Worst Fill MPG: 11.4 (low-range off-roading, before and after mods)
Best Range: 315 miles (305 after mods)
Current Odometer: 31,415 miles


  • nyccarguy nyccarguy Posts:

    Obviously fuel economy is not the Jeep's best attribute, but I'm impressed with how well it has held up. They've driven it, modified it, taken it off road... The 31,000 miles it has accumulated have not been easy. How much longer are they going to keep this Jeep? It is by far my favorite Long Term car to read about.

  • bankerdanny bankerdanny Posts:

    I wonder how much of the lost economy you would get back if you upgrade the diff ratios to something appropriate for the much larger tires you have installed. Any improvement wouldn't make up for the cost, but I would bet day-to-day driveablility would be improved quite a bit and 6th gear would be more useable.

  • clay24_ clay24_ Posts:

    Jeep over inflates their mpg calculator and its not consistently accurate. Use your own calculator and then tell us what it is. I have a '12 Unlimited Sport with the same wheels, a 3.73 rear axle, and stock suspension. I have averaged over 46 fill ups 15.49 and the Jeep has shown 16.06. The Jeep mpg calculator has been off as little as +.11 but as great as +3.36. Frustrating that the dealer can't do anything about it and my wife's '08 CRV is spot on every time! I hope Jeep improved it with the '13 updates.

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