Anyone getting close to 21MPG on the highway as Jeep claims? - Page 11 - Jeep Wrangler Forum
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Old 06-26-2013, 08:27 PM   #301
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Originally Posted by heinzbean View Post
of course mpg is a valid discussion. My diesel version is still way under Jeeps official figures. They quote 43.5mpg extra urban
34mpg urban.
and 39.8 combined. Although improved after last service still at the bottom of the figures. Only done 6700miles maybe loosens up with age. would love to know how they got these figures. Or whether they are actually achievable
Isn't that based on imperial gallons? Either way that's a dream for the states. I avg 40+ mpg in my TDI with a high of 52.7 all hwy and in us gallons. That was 25k miles ago and they say my engine isn't broken in yet. I've driven all city romps of about 2 miles to work and got a lowest mpg of 34. Amazing what diesels can do. To bad they load them down with dpf's and other mileage reducers.

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Old 06-26-2013, 09:28 PM   #302
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21.5 mpg dream on,im happy with the 17.5 im getting with 35,s and mostly city driving.

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Old 06-28-2013, 11:09 PM   #303
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Old 06-28-2013, 11:17 PM   #304
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The factory computer is notoriously generous lol
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Old 06-28-2013, 11:22 PM   #305
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The factory computer is notoriously generous lol
Don't say that!! I've been getting 21.5 mpg highway and I lifted my front end (no rake), removed my air damn, and have 195lbs of bumper/winch on my front end. I knew there was something wrong...
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Old 06-28-2013, 11:42 PM   #306
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Before I removed my airdam I hit 21.7 on a 9 hour trip from cleveland to NC. Since removing it the best I've done is 19mpg but that was only a 7 hour drive up to northern Michigan. But usually I'm averaging like 15mpg...
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Old 06-28-2013, 11:59 PM   #307
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We get 20-21 mpg combined on my wife's 2-door manual and around 17-18 combined on my 4-door automatic. Both 2012's. my 4-door has big tires too. So overall pretty close to advertised.
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Old 06-29-2013, 12:03 AM   #308
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I get 19.5 mpg combined. my commute is 11.5 miles one way with no stops at 55mph. Then I use the rubi to get parts, transport golf carts, drive customers etc. Pretty good mix. Chevron 89oct
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Old 06-29-2013, 12:05 AM   #309
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LOL damn im at like 14 now with my 35's but stock i was getting 21-22 fw and 18 in the City.. With the AC on
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Old 06-29-2013, 12:27 AM   #310
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I must be the lucky one that has a stock V6 Jeep that drinks like a fish.

This last tank I filled up with 87 octane and I'm back at 13.8 MPG average. When I burned 91 octane the prior tank it reached 14.8 MPG - mostly all city driving.

I'm not complaining .. usually I never check gas mileage.

I blame it on the EVIC and that stupid ECO idiot light.


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Old 06-29-2013, 05:28 AM   #311
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I don't even look at the EVIC, I take the trip odometer mileage at fill up and top off the tank. Mileage divided by fuel consumed = MPG. Try resetting the EVIC on the highway mine showed 41 mpg , never going to happen, it very dynamic
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Old 06-29-2013, 07:31 AM   #312
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My best to date was (calculated, not the dream-o-meter) at 20.7 on a road trip, this on a day with fairly brisk head and crosswinds.

I'm betting I'll see 21-22 on an ideal day once there are more miles on it.
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Old 06-29-2013, 08:53 AM   #313
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If you're going to calculate it with the trip mileage, then the trip mileage needs to be exact, and it usually isn't. You may notice that if you look something up on google maps, and then drive it exactly as it shows, The mileage on you trip may be different than the actual road distance due to slight variations in tire diameter over what the vehicle computer is programed to. I think they only work in increments of .25 in anyway (don't quote me on that). I suppose if you wanted the most accurate reading, you'd have to top off your jeep, drive a known gps mileage, top your jeep back off to see exactly how much fuel you spent and then divide the mileage by it!

But even then I wouldn't bother cuz there's a million other things that factor in. Just make sure your computer is set up well.
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Old 06-29-2013, 04:06 PM   #314
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Factor heat, PA, Temp Deviation, tire pressure ect ect
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Old 06-29-2013, 04:27 PM   #315
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Air density
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Old 06-29-2013, 05:10 PM   #316
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I have drove over 1875 miles in the past few days. Road trip from Montreal (Qc) to Orlando (FL) and the area. 99% was highway. The best that my Jeep's computer has showed me was around 11.2 L/100 km (21.38 mpg). But hand calculated, my average for all those miles is 12,95 L/100 km (18,27 mpg). Average speed was around 70 to 80 mph when I could. My JKU is a stock Sahara with 6 speed manual and 3.73.
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Old 06-29-2013, 08:11 PM   #317
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When I drive to NJ to visit the family, I average around 18mpg in my 4 door Rubi with 4.10s. I set cruise control at 65mph and go.

My commute to work is crap traffic, but I can still average 15-16mpg.

I use a phone app and calculate at every fill up. My EVIC is only 0.5 mpg different than the average my app tells me.
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Old 06-29-2013, 08:47 PM   #318
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So far after two weeks of ownership, I am getting between 21.6 and 22.4 MPG based on the digital display (and I know how accurate they can be). I am thoroughly pleased with the MPG on this so far, my last car (2005 pontiac grand prix GTP Comp G) was getting about 18-19 on the highway and it took only premium .
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Old 06-29-2013, 10:56 PM   #319
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My last fill-up showed 20.8 mpg after doing the math. It was a tank of regular mixed 50/50 with Premium/NO Ethanol. The drive was mixed with some I-5 including Siskiyou Summit and then paved mountain roads in Siskiyou county CA plus around 20 miles of steep 4WD high. My Sport S with 3.73 only has about 1750k miles and otherwise the best I had seen was low 18's.

Not sure I will continue with the experiment because the Ethanol free premium cost .80/gallon more than Premium with Ethanol. Might wait several tanks and try it again.
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Old 06-29-2013, 11:37 PM   #320
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Little Falls Mn to Eklkhart Lake WI - 22.6 Mpg

Just got 22.6 on a long road trip. 2013 Sahara 2dr w/3.21 rear end.

Now I doubt the 3.73 or 4.10 will ever get that but, then again, the 3.21 aint much for big tires and wheeling.

The 3.21 is highway gears and that is how the auto makers keep up with the CAFE ratings.
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Old 07-01-2013, 09:29 AM   #321
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I get as high as 23.8 to 24 with a 3.73 2 dr 6sp but that's keeping it at 50 to 54 mph.
The minute I go up to 60, the MPG goes down to 21.5 ish.
FWIW, I also have the rear seat removed and my jk is a plain jane sport with no options except the 3.73 which makes for the lightest wrangler made.
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Old 07-01-2013, 09:55 AM   #322
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Putting on a 3" lift, front and rear bumpers, our new big brake kit and our rock sliders on my 2 door I dropped from 20.6mpg to 20.
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Old 07-01-2013, 11:00 AM   #323
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I must be doing something wrong. My JKU w/ 33's, winch, and ARB f/r bumpers. I drive pretty conservatively and yet still manage to get less than 16 mpg on premium gas.

What the hell are you guys/gals doing to get such outstanding mileage???
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Old 07-01-2013, 11:15 AM   #324
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Originally Posted by jaxgsxr View Post
I must be doing something wrong. My JKU w/ 33's, winch, and ARB f/r bumpers. I drive pretty conservatively and yet still manage to get less than 16 mpg on premium gas.

What the hell are you guys/gals doing to get such outstanding mileage???
Was your speedo recalibrated for the larger wheels? Also I don't think premuim is needed.
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Old 07-01-2013, 12:09 PM   #325
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Stock setup, 7 1/2 hour driving in the flatland's and mountains, computer showed 21.2 actual calculation when I gassed up was 20.1. I'm happy considering the mountains and running the A/C most of the day with the bikini top on in 100 degree heat.
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Old 07-01-2013, 06:13 PM   #326
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wrangler mileage

I've recently started using non oxygenated Premium gasoline in my 13/JK Wrangler.
i.e. NO ETHANOL.
Huge difference in mileage and run conditions of the 3.6.
I saw 24.1 today! Normally at least 22 with this gas type.
It costs more but so many benefits, I don't mind the hit.
It CLEARLY performs better!
I also use Mobil 1.
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Old 07-01-2013, 10:11 PM   #327
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I have 30000 on my JKU with 3.8 I was constantly getting 18 in town and 21 on the highway,,, until the 2.5 lift and 33 Procomp ATs now I get 15 city I won’t know the highway until this week...
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Old 07-01-2013, 11:03 PM   #328
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If i am on flat land, cruise at 55, i get 20ish. In town, ouch. I have 1500 miles on mine

Hope it improves, but it does weigh over two tons and is shaped like a box.
Not holding my breath.
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Old 07-01-2013, 11:23 PM   #329
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I get very good gas milage...filled up tank only couple times since bout the Jeep...

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Old 07-02-2013, 07:45 AM   #330
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Better yet. Sell your jeep and buy a "insert economy car here" then go out to your local trail and cry when you get stuck.
Stop trolling so hard. If someone wishes they got better gas mileage let them be.
Just go 23.5 mpg on a trip and the whole time I was challenging my jeep to get the best MPG possible.

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