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20+ MPG at 70 MPH

9K views 59 replies 48 participants last post by  Cascade Wanderer 
#1 ·
How many people actually get over 20 MPG at or above 70 MPH in their JK? If you do, please post your numbers and your set up (gears, tire size, etc.)

I know several people say that get 20+ MPG but then they usually say they only travel at 60 MPH and that does not mean a lot especially when the speed limit is 75 everywhere here in Texas.
 
#2 ·
17mpg at best on a good day going with the wind at 70 on highway. 2.5 lift and 35s, 4.10 gears, 3.6 pentastar and Procal calibration.
 
#3 ·
Average. 15.5 hand calculated around town
 
#5 ·
People exaggerate.

Does it matter?

BTW, I get 73 MPG on my JKR with 4.88's and 35s. :mooning::mooning:

Regards,
No it does not matter. If I wanted great gas mileage I (just like most of us) would have bought a different car. I am curious and I am sure other people are too. And whether or not you like it is a topic that comes up all the time when talking about motor vehicles. It is an interesting number we can all compare with each other. Hell, even in F1 this year there were a lot of comments that these were the most economical F1 cars at 5.5 mpg :)
 
#9 ·
Still trying to figure out the fixation some folk have with MPGs and Wranglers. If you have to commute through some rough country to get to work I can understand your concern. However, If you have to commute through paved roads to get to work then get a Prius if you are worried about MPGs. Don't get me wrong, I always look for cheaper gas, but IMO you don't get a Wrangler to be worrying about MPGs. Having fun comes with a price.
 
#49 ·
Same experience here. Have gotten as good as 23 on straight highway cruise in the JKU.

I gotta laugh at the people that say why does it matter. It does and just like someone pointed out, a sudden drop can mean an issue. I use an app on my phone and track it like a religion. Surprisingly, I bought my JK BECAUSE of the MPG's. My 05 explorer averaged 14 and never got better than 19 and that was only once. My JK and the JKU are averaging 18+ and with 20+ on the highway, it matters to me as far as how far I can go. Hope to test out how the off pavement MPG's are soon. I hope it's better than the 9 or 10 I used to get in the old rig. My f350 gets better mpgs than that dang explorer ever did.
 
#11 ·
Not that I care about MPGs but I travel 65 miles a day to work and back. It's all high way and I currently have poison spyder front bumper. Bestop rear with tire carrier, terraflex 2.5 coil lift with 1 inch spacer in rear to counter the heavy bumper and tire, 35x12.5 procomp Xtreme mud terrain 2s. And AEV proCal tuner to recalibrate everything. It's was a 6 speed manual sport with factory gears I believe 3.21. Granted I've lost 6th gear usage I still get 21mpg at 70mph. Now in city I only get 14mpg.
 

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#13 ·
Didn't by a Jeep for good mileage
 
#14 ·
I have a 2010 Sport. All stock and I use the hard top. I get 21 to 22 per gallon. I can usually drive between 320 to 330 miles on a tank. Mine has an auto trans and the 200 or so horse engine. I think it was 2012 when they changed the engine to the 280 horse. I do a combination of street and freeway. Stays pretty much the same during winter too. I would imagine 4 wheel drive, using the air with stop and go would lower it. Depends upon how you drive too. Plenty of variables...hilly terrain will cause you to burn more gas too.
 
#15 ·
M-F on my work commute, 21 or so in the first 2,000 miles I've owned my new JK. I drive about 30 miles each way to work on paved highway, so a little more than 60 miles each day, plus some driving around once I'm working. Other than about 5 minutes of traffic, the cruise control is usually around 70MPH. Whether we should worry about MPG, IDK maybe I'm a cheapskate but if I can net 3 MPG with the 3.21 gears vs the 3.73 or 4.10 the way I drive in my area, that gets me just about to and from work one day on 20 gallons of gas (20x3=60 miles). I'll admit MPG wasn't my first priority, but it wasn't my last either. And as much as id love to go Jeepin' every weekend, that's just not in the cards with my kids the age they are. That said, every time we go anywhere, the kids beg to take the Wrangler! We love it!!
 
#16 ·
I commute about 74 miles per/day and cruise at 65-70 avg about 21-22.3
3.21's on 32's so far Automatic.
As for those who find exception to a member having a MPG thread - I'd say ..... then don't post in it.
Comments like "If you care about MPG then why'd you buy a Jeep" are at least as over done as MPG threads and probably about 10-20 times moreso considering how many times it gets repeated in EVERY thread.
I drive a Jeep because I WANT to and I CAN if I wanted a Prius I would - I don't. Doesn't mean I don't care about fuel useage - I also check local prices on GasBuddy should I...... play a video game instead?
Anyway, Op - seems like a stock JK will do pretty decent if driven moderately to include cruising speeds of up to 70 mph after that things dip a bit. I did a round trip doing 80+ mph and I think I went down to about 19.2 which I still didn't think was too bad.
 
#18 ·
It's not impossible but the driving conditions must be near perfect. Flat, straight, temp in the mid 70, no wind or rain, no A/C, hardtop on and windows up, 1/4 tank of fuel, non M/T tires running at 35 psi + and no passengers or cargo to speak of

I just did two trips this July one trip from SoCal to San Antonio TX (2600 miles in three days of driving) and another trip to Moab (1500 miles in two days of driving) in my A/T 13 JKU with 34" M/Ts, 3.73 gears, ARB bumpers, winch, misc under armor and three occupants plus everything else needed for hotel stays and off road play. Needless to say my JKU was heavy. Cruising at around 75 mph the average mpg I got was 17.3 mpg to TX and back and 18.2 to Moab and back. The worst mileage was driving through South East AZ on the 10 frwy in 109 degree heat with a cross wind, 14.5 mpg.

Interestingly my "sweet spot" for best speed and fuel economy when running heavy where my ECON light comes on and stays on the majority of the time is 73 mph. Over that by 3-4 mph and it's a crap shoot and mpg starts to tank fast.
 
#21 ·
Just over 20mpg hand calculated on a 450 mile round trip from Knoxville to Nashville @ 70mph or so last week.'12 JKU Sahara, 3.21/auto, stock Bridgestone A/Ts.

I certainly didnt buy the the Jeep for gas mileage, but compared to my 3.92 geared hemi ram 4x4 crew cab its a gas sipper..
 
#23 ·
I was given a company Trailblazer, so I only get to drive my Wrangler a couple days per week. I have no problem driving 60 mph and getting 20-21 mpg. At 70 mph, it gets around 18 mph.

I just listen to Foghat and cruise at my own pace.
 
#27 ·
Just got back from a 2800 mile road trip. 4.88s 35s speed 65-80 99% highway. I averaged my mileage at every fill up was steady 13.5 MPG. Fully stock with 3.73s 255/70/17 I made the same drive averaged 16.5 MPG. All in All I could not be happier unless maybe I had a diesel in my JK.
 
#28 ·
Jeep can get you better gas mileage at the cost of what?...less power, thinner metals, more plastics, lighter vehicle, smaller tires, more non-flat surfaces?

Believe me, I'm a penny pincher, but when it comes to Jeeps I rather loose 5+ MPGs to have a tougher vehicle. I'm glad they didn't destroy the Willys image throughout the years by listening to people wanting better gas mileage.

You know how Jeeps have different editions (i.e. Sahara, COD, Attitude, etc.) well, how about a MPG edition. I'm thinking 2wd, 45* slanted windshield, small wheels, 4" from the ground, aerodynamic mirrors, etc. They could even make it a Hybrid. LOL.

Don't take it personal, having fun here.
 
#29 ·
Really don't understand these guys that say they don't care about milage. My other car is a Corvette and I care a lot about how much I spend getting down the road. How about this, the worst milage I ever got on my 2012 JKU with 3:21's was on a trip west to Tulsa with a strong head wind and 75 - 80 MPH.
Jeep sucked the tank dry in a hurry at 15.4 MPG.
 
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