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Topic Review (Newest First)
03-20-2014 01:19 PM
59 jeep 25000 on my 2012 wrangler sport with goodyear authorities. Still on the winter gas here in N.Y. Towed my 2 place enclosed trailer with two sleds in it, 300 miles doing approximately 65 mph. Got 13mpg according to the onboard. Even though I opted for the 3;21 rear end it pulls the trailer with no problem. My buddy has a 2005 Dodge Ram gets 7 mpg pulling the same trailer. I'm satisfied and absolutely love my jeep.
03-20-2014 12:13 PM
bignanoman I consistently get 19.5 mixed driving. 21.5 max on freeway trips
03-20-2014 07:57 AM
Dmactampa
Quote:
Originally Posted by Diezel27 View Post
Official calculation was 14.8




With that list of mods I highly recommend you never concern yourself with MPG again. Lol.

I am hoping to be in that boat shortly.
No doubt!! Only reason I was a little bummed is because I'm ready to put on a supercharger and don't want poor mileage to be a potential cylinder issue and find out afterwards.
03-19-2014 05:36 AM
longhorn1966
2012 Rubicon mpg

2012 Rubicon 2dr, getting 17.1 mpg, all city, driving like grandma. The best I have ever got was about 19mpg.
03-18-2014 04:48 AM
EricTheRed
Quote:
Originally Posted by Diezel27 View Post
With that list of mods I highly recommend you never concern yourself with MPG again. Lol. I am hoping to be in that boat shortly.
LOL! Agreed! Also, I've found that doing anything above 65 on any terrain that's less-than-downhill is going to result in horrible mileage.

If anyone is strictly going by the on-board calculator, you'll almost never get an accurate result. Sometimes mine is pretty close to the "hand calculated" mileage...other times I'm like "uh...computer? Were you even paying attention on that drive???".

I use a free app called Road Trip. Been using it to log my mileage in four different vehicles over the last four years.
03-14-2014 11:28 AM
Diezel27
Quote:
Originally Posted by Diezel27 View Post
I will update when I fill up next and can calculate actual mileage.
Official calculation was 14.8


Quote:
Originally Posted by Dmactampa View Post
I could only dream of these numbers. Mine is bad. Almost to the point I think something is wrong but I don't have a CEL. Just drove to Big Bend from San Antonio. It was windy and the speed limit is 80, which is what I drove. I have a 3.5" lift and 35" Nitto Trail Grapplers, front and rear bumpers, etc. Mileage both ways was around 10.5-11.5 mpg. Not good at all. I also have an auto and 4:56 gears. It's a 2012.
With that list of mods I highly recommend you never concern yourself with MPG again. Lol.

I am hoping to be in that boat shortly.
03-14-2014 11:24 AM
Dmactampa I could only dream of these numbers. Mine is bad. Almost to the point I think something is wrong but I don't have a CEL. Just drove to Big Bend from San Antonio. It was windy and the speed limit is 80, which is what I drove. I have a 3.5" lift and 35" Nitto Trail Grapplers, front and rear bumpers, etc. Mileage both ways was around 10.5-11.5 mpg. Not good at all. I also have an auto and 4:56 gears. It's a 2012.
03-13-2014 12:13 PM
Diezel27 1. What are your wrangler specs? (rubi/sahara/sport, 2/4 door, 3.23/3.73/4.10 gearing)
2. How did you drive it this tank? (still in break in, city/highway breakdown, conservatively or like a bat-outta-hell)
3. What number fill up is this? How many total mikes so far?

Picked it up on 3/3

2014 Wrangler Unlimited Sahara
3.21 Axle Ratio

Still in break in period. It has 673 miles and 403 of those are highway and country two lane. The rest are suburban Chicago, tons of stoplights driving.

According to the MPG "estimator" on the dash, I am getting 15.7mpg. I will update when I fill up next and can calculate actual mileage.
03-13-2014 10:34 AM
dcgibbons '12 JKU Rubicon, 6-speed manual, 4.10 rear, stock 33" tires
17.82 MPG over 18,363 miles
03-13-2014 10:20 AM
Mack207 2012 JKU
3.73 auto
2.5 AEV lift
Mobil 1 synthetic
Stock 255/70R18's at 32 psi
60/40 highway/city driving, 70 miles per day. Averaging 18 mpg hand calculated
Averaging 18.7 on the onboard readout. It's consistently .7 higher than actual.
03-13-2014 06:28 AM
Afmcronnie 2013 JKU, auto w/3.73. 255/85/16 KM2's. Just changed my oil for the 2nd time. 10k miles. Dumped the dino oil and poured in 5w30 Pennzoil Platnium. Rotated the tires and bumped up the pressure from 30 to 34. Went from an avg of 16.5 to 20 mpg. Same daily drive, same traffic, same gas station. 60f temps instead of 30f. No storms. I was getting 16.5 pretty consistently all winter. 2 tanks so far at 20. Amazing increase.
03-13-2014 03:01 AM
Rouxbicon I wish I was seeing some of these mpg numbers. After filling up 6 times and calculating I average 14.1 mpg. 2012 JKUR codmw3 with the stock tires. Hard top, aev front and rear bumpers and rock rails. Completely stock.
03-12-2014 08:36 PM
EricTheRed 2014 JKU Sport. Just bought it, then drove it from Kelowna (BC) down to San Diego. The very first tank was in town, and I got about 15mpg on that one. Things slowly improved from there. My best mileage was on the way back up to Canada...filled up in Bend, OR and didn't touch the pumps until Pateros, WA...24mpg. That was keeping it under 70mph with relatively little wind.
10-29-2013 07:44 PM
dklassen 2013 Sport S, 3.73's. I was averaging about 19.5. Put on 33" Duratracs with 15" TKO's and dropped to 18.5. According to the MPG indicator.
10-22-2013 12:10 PM
stuggin I've got a 2013 Rubi 4 door with 4.10's and I get about 16.8 mpg in combined highway and city driving. I drive fairly conservatively. On the highway I get 17.5-18 and in the city closer to 15.5-16. The highest I've ever had is 21 mpg and the lowest was 13 (big off road day).
10-22-2013 11:49 AM
mjpjr45 13 Sport, 4.10s, 6spd, 305/70/17 Terra Grapplers. Last fill up got 15.8mpg, been averaging between 15-16mpg. Mostly rural and city driving, with some highway.
10-22-2013 09:42 AM
autodigit [QUOTE="BoulderGT3;5560346"]2012 jk sport. 3.21 with 6 speed. 16mpg stop and go. 18 mixed and 21mpg at 65-70 mph. 285/70@-17 with relatively light tires and wheels. Got about 1mpg better across the range with stock tires.[/QUOTE

These are just about the same numbers i'm seeing on my 2013 JK with the 5 speed auto and 265/70/17 Duratracs. The JK has the aerodynamics of a brick so >65 mph on hiway really sucks gas.
10-22-2013 09:20 AM
BoulderGT3 2012 jk sport. 3.21 with 6 speed. 16mpg stop and go. 18 mixed and 21mpg at 65-70 mph. 285/70@-17 with relatively light tires and wheels. Got about 1mpg better across the range with stock tires.
10-22-2013 09:11 AM
DANNY-L 13 jk sport,3.21 auto with 315/70/17 14mpg or less
10-21-2013 11:39 AM
redrockculichi i wish i can get at least 17
i do mostly city driving. and always get around 12 mpg
10-01-2013 05:15 AM
Lusus_Naturae Winter blend is on order now, 4-6 weeks probably before it gets here.
09-28-2013 12:40 AM
fireguy
Quote:
Originally Posted by aargh View Post
I see a lot of folks post mpg with larger tires, if they haven't reprogrammed the ECU the mileage will appear to have gone down since the tire revolutions are less. As an example, if you have the stock 16" tires and you throw on a set of 32's, the difference is about 8% or a little over 1 mpg. So if you haven't done the reprogramming you need to do the math.
I reprogrammed with a AEV Procal to reset everything after putting the 315/70 17 tires. The rig drove terrible prior to doing the program re-calibration, speedo was way off, transmission did not shift right and tpms was reset for lower pressures. Still very happy with the fuel mileage but our winter blend is in and I am down in the 17's now.
09-27-2013 08:35 AM
aargh I see a lot of folks post mpg with larger tires, if they haven't reprogrammed the ECU the mileage will appear to have gone down since the tire revolutions are less. As an example, if you have the stock 16" tires and you throw on a set of 32's, the difference is about 8% or a little over 1 mpg. So if you haven't done the reprogramming you need to do the math.
09-27-2013 08:20 AM
ssgjason
Quote:
Originally Posted by Lusus_Naturae View Post
Here's my gas mileage update -

Oklahoma ……
…...

Germany Rejects E10 Ethanol Infused Gasoline | AutoGuide.com News

Why Are Germans Boycotting E10, the Ethanol Fuel? : TreeHugger - the comments are even better

x2


But to actually add: I get 15.8 mixed city and 19.5 interstate. I have gotten up to 20 when driving county roads but I don't often get to do that,
09-27-2013 07:23 AM
aargh Had a 2012 JK sport, never saw 19 mpg and I commute 60 miles every day. Traded it in because they replaced the left head twice and I threw in the towel. Bought a 2013 Unlimited, mileage is about the same. Have experimented with different speeds, 55 mph thru 70 mph, cruise on, cruise off, still in the 18 mpg range. I noticed that the wife gets about the same. During the winter it runs in the high 16's. I did find that I get about .5 mpg improvement when I don't use the cruise control. I attribute that to the fact that I don't force the vehicle to maintain a preset speed when I go up hills. A lot of this depends on elevation, terrain and temperature of the area you live. Most Jeep JK owners in our local club get around the same. EPA says 18-21, we would all be on the low side. If designers tilt the windshield back, shed about 1,000 lbs, aero the hood and fenders, add a diesel, then maybe we'd see 40mpg, but then it'd be a Jetta not a Jeepa!
09-27-2013 07:04 AM
longhorn1966
2012 Rubicon gas mileage

I have switched to synthetic oil, tried various brands and grades of gasoline, but the mileage has not varied much. When new I got about 16mpg average, now 18 months later I get 17 to 17.7 in normal driving. This is almost all city driving and I gues the mileage will improve somewhat over the next few months. I only use 87 octane gasoline now. It runs like a swiss watch, love it.
09-26-2013 09:41 AM
st0rmtr00per 2012 jk sport with 17 inch rims and stock 32's
2 door
3 peddles
not much highway miles lately and still getting around 20.5 to 21.0
09-25-2013 08:29 PM
panhandlr And then there's all that water that an ethanol plant uses. Boy....
09-25-2013 03:26 PM
Lusus_Naturae Here's my gas mileage update -

Oklahoma - 100% gas, 87 octane -
I average 20 if I drive almost all highway miles in light traffic.
I average 17mpg if I'm not doing a lot of stop and go traffic, mostly highway, some city - most of the driving I do.
I average 15.8 city, with some highway, and stop and go.

We drove up to see family in Chicago about Labor Day, I had my trailer in tow to haul some furniture back.

Around town in Oklahoma I barely notice a drop in mileage for highway towing, in city maybe 1mpg. I don't tow enough to show a major decrease per tank.

Going to Chicago, we out first tank of Oklahoma fuel averaged about 16.5 of the highway, we had a few items in the trailer but nothing heavy.

As we progressed through MO and IL, the mileage dropped a little, we came into Chicago averaging 15mpg or so - outside of Oklahoma we could only find E10.

Driving around Chicago that week we also had 'Chicago gas', whatever they mix up and decide is fine. We had comparable driving to the low OKC average (I average 15.8 city, with some highway, and stop and go.) and the mileage was 14-15.5 in Chicago depending on how much highway (actually moving traffic) we did.

On the trip back the trailer numbers really show up though. I averaged the whole trip back and we got 13.8 mpg. The trailer wasn't fully loaded, but it had more weight on it, there was also a headwind coming back too.

Got back into OKC with E10 in the tank from Kansas still so I had to burn that off, noticed with my normal driving in OKC again I was still about 1.5-2+ mpg less running the E10.

Burned that off, got back to my 100% gas again and my average has been about 17mpg again.

What gets me is that all through these states with E10, especially Kansas, I noticed all these propaganda signs on the pumps - little wind energy icons, or green trees, and stuff about corn burns cleaner. Yet corn uses more energy to convert it to fuel than raw oil, and usually the plant making ethanol is running off electric it buys from a company that produces it with a coal burning plant. Then the numbers don't add up either, I was burning more fuel using E10 too, making me buy more gas.

My apples to apples comparison

My E10 upon returning to OKC vs. 100% gas in OKC -

$3.02 Enthanol vs. $3.19 100% gas (both current prices in OKC today)

15.5 mpg on ethanol - 17 mpg on 100%

155 miles - 170 miles - per 10 gallons

lost is 15 miles during that time using E10 - I'd need almost a gallon more to drive the 170 miles I got on 100%

Cost - $30.20 for E10 - $31.90 for 100% = $1.70 difference

If I bought the extra gallon (roughly) to get me to 170 miles, I spend more than the $1.70 difference I "saved" by buying the E10 to begin with.

^ This is what so many people don't look at. They look at the immediate savings at the pump," I saved $1.70 by buying the E10.", yet they don't calculate in the loss of mileage (most probably don't even think of it or keep track).

This doesn't even touch the issue that older cars can't handle the E10, and newer ones aren't exactly built for it either although most tolerate it.

If you look at what happened in Germany when they tried to begin E10 sales, it makes you think a little. People here bought into it and were forced into it in many areas, people there refused in many instances.

Germany Rejects E10 Ethanol Infused Gasoline | AutoGuide.com News

http://www.treehugger.com/cars/why-a...anol-fuel.html - the comments are even better
09-25-2013 02:45 PM
Lusus_Naturae
Quote:
Originally Posted by guerrerito View Post
2014 JKU/Auto/4.10. It has 350 miles all city but it seems I am averaging 11.3 miles. I been driving it very ECOway to see if it was only me going crazy but I feel there is something wrong. Short commute: https://maps.google.com/maps?saddr=O...1,0&sz=17&z=14

Any thoughts?????

It's new - there are lots of threads about break in gas mileage and engine behavior. Give it some miles and see if it improves, city mileage is also worse than highway - if I reset my mpg and just drove city I would see a lot worse on average too.

Reset the EVIC and take it for a drive on the highway or backroad of at least 50 mph. Put some miles on it too, say 10 miles, and then check it again. Driving into a headwind will lower it too of course (brick aerodynamics).
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