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Old 04-27-2013, 09:45 AM   #61
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Stock auto 3.73 we easily get over 21 but only if we're going under 70. So far I've had two highway only tanks 21.3 and 21.5. Not Jeep calc but by my mileage tacking app.

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Old 04-27-2013, 10:49 AM   #62
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Originally Posted by legitposter View Post
Those of you with pentastars and want better mpg... Try going light on the throttle for a day. You'll know you're doing it correctly when every_single_vehicle around you leaves you behind from a red light. You can then catch up once you're around cruising speed. Also, when speeding up while already at cruising speed, try to do it lightly enough to where the ECO light never turns off. It's a nice little challenge.

I think these must be big reasons I'm over 20mpg in a JKU and my wide over 21mpg in a JK
Going to try this today

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Old 04-27-2013, 11:38 AM   #63
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I've got about 2300 miles on my stock 2013 JKUR with 4.1 gearing. I've been doing the math myself, and I'm getting between 14.5 and 15.5. I drive a mix of city/highway, and I've been pretty easy on the throttle. Oh we'll, it's better than my previous Expedition.
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Old 04-27-2013, 11:44 AM   #64
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I see 14.6 mpg (13' JKU Sport S 3.73 5sp) auto on my computer... however it's 80% city driving including 45 minutes idling at the border crossing last week. I'm sure if I put it on the highway I'll get close to the 19-21 that most get.
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Old 04-27-2013, 12:13 PM   #65
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13 2dr stock. Hwy 24mpg. I keep it at 65mph. Next week getting new tires/lift. 33x1050. We'll see how many mpg's I'll lose. Not really concerned about gas. It only gets driven 4 days out of the month.
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Old 04-27-2013, 02:56 PM   #66
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2 Door Rubicon 4.1 gears, Auto, Weighs in at 5000 pounds (certified scale weight), Roughly 900 pounds over curb weight, stock suspension, tires, and wheels. Second tank of fuel calculated 19.8 mpg, drove from Charlotte to DC and back now 1500 miles on the Jeep averaged 18 mpg calculated and had a strong head wind. For the DC trip I only bought Shell 87 octane and stop when the pump kicked off.

For the second tank I burned this in the same day bought real gas, no ethanol, at local station in Clover on both ends of the trip to Greenville, SC. This is a station that is full service so I had the same attendant pump the second tank and stop when the pump kicked off.

Planning on driving Jeep from Clover to Dayton Ohio on Monday and return on Wednesday this coming week will try it again
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Old 04-27-2013, 03:45 PM   #67
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I drove my '12 JKR 4.10 cross country last year and stopped in umpteen national parks and even did some trails in Moab. I averaged 18+ mpg overall, and consistently was at 21.x on the highway. For a time in yellowstone, I was at 27. FWIW, I definitely think the ethanol gas kills your mileage.
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Old 04-27-2013, 09:51 PM   #68
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Checked mine earlier tonight: evic said 22.8 but hand calculations said it's 22.6.
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Old 04-27-2013, 09:57 PM   #69
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Made 250 mile run on the freeway yesterday.....filled up before & after....measured 22.2 mpg for that distance.

08JK 3.73/auto
Typically overall average is just between 19.5-20 for all around use.

But I _CAN_ make it go to the low 16s.....
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Old 04-28-2013, 01:30 AM   #70
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we get 18.7mpg mixed with 70/30 split being mostly highway runs. pure highway is 23mpg.
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Old 04-28-2013, 01:42 AM   #71
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Milage 2013 Rubi 2 door

I have a 2013 2 door Rubi and just took a 3600 mile trip from texas to idaho and back. Granted the trip was far from always on level ground but I did track my milage at every fill up and I rarely achieved 21 mpg. I drove all posted speed limits. I found that as you would expect the best mileage was around 60 to 65 mph. I even got around 21.7 mpg on level ground just north of Roswell NM. As soon as i sped up to lets say 70 mph the milage dropped to 17 mpg. Also the milage really dropped off at higher elevations (+5000 ft).
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Old 04-28-2013, 07:13 AM   #72
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12 jk with 3.21's stock 18" with 32's dd about 34 miles round trip all back roads in rural Jersey. I average between 21 and 22, I baby it for the gas mileage. Will end soon , I'm going to upgrade to 33's, not sure what size rim yet.
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Old 04-28-2013, 07:17 AM   #73
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4:10's with 35's. 1600 miles on mine. Running regular gas. Took a ride down the hwy not a real long run, about 20 min ride. My avg was 20.1. Not to shabby. I'm thinking we are on summer blend now. I was only getting like 18 on the winter blend.
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Old 04-28-2013, 09:20 AM   #74
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i have a 2 hour trip today, mostly highway ... will post back. here the speed limit is 70 so i'll be going 70
ok ok, i averaged between 18.5-19 mpg over 250 mile trip. most was highway and the speed limit here is 70 so i was doing 70-75. the jeep seems really happy at 60-65 though and i probably could have squeezed 20mpg. this is with jkur 4.10s manual.
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Old 04-28-2013, 09:54 AM   #75
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^^ on my list for next year once a few more mods are on.

Any suggestions for trails up near Taos? I have not been up there for 10 years or so. Sandia Ranger District closed off a lot near Abq.
A lot of forest roads, but I'm not out looking for trails to run just to run trails. Other guys probably have better info. New map for Santa Fe Natl. Forest just published - Santa Fe - Projects

Carson district is working on road "rationalization" too. Right now it's just kinda confusing, but most roads that have been open are still open - for now.
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Old 04-28-2013, 03:34 PM   #76
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JKU 2012 Sahara stock tires, 3.73's and auto just below 65 average hiway 21.5 0n dash indicater whis is about 2/10th higher than doing the math. Same 30 mile commute back road very few traffic lites it'll break 23 at 45/50 mph. Oh ya that was before Chrysler put new head on, don't think as good now??? My old 2007 JKU with 4.10's and auto did just as good on hiway, not as good on that back road commute. That had a dual exhaust flowmaster setup...Pentastar is supposed to be better, that's questionable? At least the "old" 3.8 didn't have head replacement trouble...like the new Tranny though!

Oh ya, trip to Nova Scotia about 1800 mi last summer averaged almost 21 overall...old head???

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Old 04-28-2013, 04:15 PM   #77
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2013 rubi unlimited with 285/70/17 and no lift. We took a small sight seeing trip to northern Nebraska this weekend. On a one lane rural hwy I got around 21mpg while at 55mph. When I was over 60 it went down to 18. Oh, 4:10 gears.
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Old 04-28-2013, 04:19 PM   #78
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I have a 13 JKU Sahara- 3.21 gears.. averaged 21.5 from SC to DC and Back.. Mainly highway and some stopping in traffic. The math was spot on with my hand calcs as well..
Nice
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Old 04-28-2013, 05:00 PM   #79
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Can't see how you'd get any decent mileage from an Unlimited. Like hauling a tank around!
I have a 13JK 2Dr and get about 21MPG on freeway. I couldn't afford to drive the 4 dr version!
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Old 04-28-2013, 09:46 PM   #80
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Anyone have mods like a free flowing exhaust/computer chip/cold air intake and get different mpg readings? I know some of these mods do claim power and mileage gains.
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Old 04-28-2013, 10:10 PM   #81
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I have 3.21 gears, stock 29" wheels. I live 3 miles from work with about 14 lights in between. My average is 11 to 13 mpg, I'd like to know if I chang to 33" tires and keep my gears, will it make any difference? Could it possibly get worse?
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Old 04-28-2013, 10:40 PM   #82
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Anyone have mods like a free flowing exhaust/computer chip/cold air intake and get different mpg readings? I know some of these mods do claim power and mileage gains.
I'm getting a lil over 6% better mpg after the superchips Flaspaq. 2010 JK.
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Old 04-29-2013, 12:42 PM   #83
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like most JK owners the only way i can get that kind of mpg if i keep resetting the avg mpg calc
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Old 04-29-2013, 12:48 PM   #84
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Box stock 2010 wrangler automatic
This is the best I've seen 8.7 liters per 100 km (27mpg)
My normal average is 9.5 liters per 100 km (24.8mpg)


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Old 04-29-2013, 12:49 PM   #85
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Quote:
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Anyone have mods like a free flowing exhaust/computer chip/cold air intake and get different mpg readings? I know some of these mods do claim power and mileage gains.
I lifted my 2013 JKU 2 inches, put on 33's x 12.5 with 17 wheels. I have been on a few trips off road and on the highway and wrote down my mpg. I then put on a AEM Cold Intake System, did the same run, and didn't see any difference. I sent it back, and just put in a AEM Air Cleaner filter and saved my money. I would like to hear if others have had the same results. I have heard that earlier models of cars, trucks, jeeps get good results from a cold intake system but newer models don't.
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Old 04-29-2013, 12:51 PM   #86
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like most JK owners the only way i can get that kind of mpg if i keep resetting the avg mpg calc
I 328mpg by pressing the reset button while going 65mph and coasting downhill.
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Old 04-29-2013, 12:54 PM   #87
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Stock 2012 JKR with 3.73 gears and 32's. I see 20+ on occasion when I stick to secondary roads and keep the speed consistent around 55MPH. Beyond that, roughly 19MPG at 70MPH.
Pretty much the same as me.
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Old 04-29-2013, 01:36 PM   #88
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I 328mpg by pressing the reset button while going 65mph and coasting downhill.
Sounds like we should start a new thread on how to get over 300mpg in JK.
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Old 04-29-2013, 02:22 PM   #89
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20-21 mpgs on a stock JKU manual and 3.73. That's using cruise control and at about 55' above sea level in lovely Florida.
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Old 04-29-2013, 02:38 PM   #90
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In the 4 months I've had my 2013 2 door sport, I've never gone below 18 mpg for a tank. While I haven't gotten 300 mpg, I regularly hit over 300 miles before getting the fuel low warning on my DTE.
6 speed, 3.21 with stock tires.

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