Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum > Improving your gas milage?!

Join Wrangler Forum Today


Thread: Improving your gas milage?! Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
08-03-2012 04:06 PM
LVCapo To the guy that said tuners do nothing for a gas engine, I disagree. I went from 15-16 to 18.5 with a SC Flashpaq on my 2007 Rubicon. Changing the shift points does make a difference.

On my 2012 with 33"s and a 2.5" lift, as well as stubby bumper and winch I avg 18.5-19 mpg mixed driving (highway/surface streets). On trips over 200 miles I avg 18 mpg doing 65-70. I just crossed 5000 miles.
08-03-2012 03:34 PM
bloodfart what if i put a vortex generator on my soundbar, would that help mileage??
08-03-2012 03:29 PM
firehawk
20 to 30 mpg's

hi, stay with the factory 17" that come with the S package, remove the spair leave it at home, take a can of fix a flat, remove the rear seat. leave it
at home with the spair u never use, turn on the ECO and drive in that range,
trade in the 4 door for the 2 door jk, remove the 3.83 or 4.11 rear and get
the 3.21 remove oh wait , just trade in your jeep for a 2013,
or wait for the 2014 u may have the new 8 speed auto that the factory mates
to the 300. bing, you will now have 20 to 30 mpg's you could pull the motor
from a prius that should get u a few more miles, hope u had some fun reading..
all the best enjoy ur jeep.. find some nice spot and drive in some mud..
08-03-2012 03:23 PM
Olysouthpaw24 HP essentially = TQ*RPM. Because energy in has to equal energy out, increasing torque OR horsepower decreases MPGs. This is why trucks, in general, see very poor mileage.

Because you can not reduce the torque your engine puts out at any given RPM--To increase MPGs with your current rig minimize stops, fast acceleration and high RPMs.

I get the best MPGs in my 12 JKU arround 50 mph. I can crack 25mpg with the AC on.

Quote:
Originally Posted by clogan View Post
I wonder if a different engine, one with, say, 50% more torque would improve Wrangler mpg?
On my F-150, I'm getting 16.5 mpg, pushing 6,000 lbs. But my engine is puttin out 400 lbs/ft or so.
Any of you Wranglers out there with resto-mod engines care to give your mpg?
Wonder what else there is about the Wrangler that causes poor MPG other than wind resistance? It's really not all that heavy. Guess it's all in the gearing.
What is the rpm at cruise at 55 mph?
08-03-2012 03:14 PM
Olysouthpaw24 No idea about softtop, but my MPG with hardtop on/off is negligibly different. We are talking a few tenths of a mpg--nearly impossible to distinguish with a typical mixed city/hwy tank.

I am very conscious of accurate mpg calcs, these comments reflect hand calculated mpgs.

Quote:
Originally Posted by Idorian1650 View Post
How does MPG change with hard top/soft top/no top?
08-03-2012 03:10 PM
Olysouthpaw24 Funny, I bought my new JK to improve MPGs over my F150 5.4.... Turns out I am seeing a 35% improvement.... good for almost $1000 per year.

3.73LSD/Unlimited/32" SRAs stock/6 speed manual

Ford:
3.73LSD/5.4 3v/4 speed auto/2005

Jeep: 19/23 city/hwy
Ford: 14/17 city/hwy

I don't see much possible way to improve a stock JKs MPG. If you have a lift/offroad tires/taller than stock gears your MPG will look close to 16/19.

Quote:
Originally Posted by clogan View Post
Subscribing...

I've been mulling over the possibility of selling my Roushcharged F-150 Screw and buying a Rubicon. But it's amazing to me that my 6,000 pound, supercharged truck, with a 5.4 Liter engine, gets practically the same mpg as a JK weighing 40% less with a V-6. Takes a lot of fuel to turn that 4wd, huh!

Go figure!!
08-03-2012 02:19 PM
Plasticpirogue
Quote:
Originally Posted by sergeoval8157 View Post
No mods. (yet) lol 100% stock. I only have 400 miles on it, I've heard u get better gas mileage once u break it in a bit. Been considering a lift and fatter tires, on avg how much will that decrease my avg miles/gallon
Unless you go big with the mods (BIG mudders, lift, heavy bumpers & winches) you should see about 20% drop in MPG. Stock driven moderately on the highway can get you 20MPG, but loaded up with weight, jacked up, and hamstrung with high rolling resistance tires will easily drop you into the 15-16mpg range. That's 20-25% reduction.

Heck, it's a Wrangler. It's about as aerodynamic as a brick with a sail on top. Honestly...what did you expect? Seriously, in town just drive it easy (not talking about granny driving, just don't race from light to light) and on the road just keep the speed down. Aerodynamics of that nearly vertical, almost flat windshield will KILL you if you try to boggie on down the Interstate. That's exactly why I typically don't drive a Wrangler on the Interstate....they are much more comfortable on the 2 lanes...and the scenery is better anyway.
08-03-2012 01:19 PM
Idorian1650 How does MPG change with hard top/soft top/no top?
06-12-2012 10:10 AM
Prelud3 I had a 2011 jku bone stock 3.23 rear end, 6 speed manual, and daily commute (mostly country roads) averages 14-16. I now have a 2012 bone stock 6 speed manual with 3.73 rear end and I average 19-20. Going to my home town about once a month, all highway but through the Ozarks 70-75 I used to get 17 tops, I now average 21. If I take the back roads, very hilly but 65 top speed I averaged 18 on old 22-23 on New. I currently have 4500 miles on my 2012. No change in driving habits. So at the minimum I save 3 cents a mile, which so far means I've saved 135 dollars. I strongly disagree with people who say the new 3.6 doesn't get better gas mileage lol.
04-21-2012 11:52 PM
mattjopete
Quote:
Originally Posted by strider_mt2k View Post
Owning a Wrangler is enough to make me use MORE gas.

I mean, I'm STILL looking for excuses to drive the thing!! STILL!
Did the same tonight myself...

I've been averaging just over 20 each tank, Best I've gotten was 21.5 worst was 18.5.

Like others have said, your best bet is to drive like an old person, I love seeing how far I can roll in neutral
04-21-2012 08:27 PM
ppdiaporama I have about 1000 miles on the clock of my '12 Sahara.

Pure city driving --a Stop sign every few feet and insane traffic, I get like 10-13MPG.

Combo city/hwy I'm getting about 18 and if I just do Hwy I'm getting about 23-24

Of course a month ago, I had a Mazda5 so this represents a considerable increase.

To offset the increase, I drive real smooth and real slow --both were foreign concepts to me a month ago.

I also (plan on) using my wife's Focus a bit more for short trips around town.

I did a test the other other day to and from the grocery store --about 1 mile each way. With the Jeep, I got 13MPG and with the Focus I got 26 --and I drove it hard!
04-21-2012 01:24 AM
99 wrangler Just bought a 2012 unlimited sport, it has 3.73 gears and 600 miles on it now. We are getting 19 - 20.6 mpg as of right now. Well that's what the eco display says, so far the biggest gains we have noticed come from taking off nice and easy and not going over 65 mph on the highways. I try to ALWAYS keep the rpm's in the green on that tac, but seems ti be better if we run at the top limit of the green which is about 2100 or so. Considering a cold air intake, and a programer but going to wait until we break it in more. With all that said, its a jeep and we DIDN'T buy it for mpg. Put your top down, get the sun on your face and thoughts of mpg go out the window.
04-20-2012 05:54 PM
JeeperSter
Quote:
Originally Posted by Ltblue
I'm rich so I just floor it everytime bahahahahahacough* jk
Buddy does this with his Ford f250. He gets like 7mpg and could care less
04-16-2012 02:50 PM
Ltblue I'm rich so I just floor it everytime bahahahahahacough* jk
04-16-2012 02:36 PM
firehawk
jeep good mpg

hi, i get 20 mpg city,30 hwy , 2012 ,jk 2 door soft top with auto,
i keep the ECO on all the time and drive in the 1000/2000 rpm range, it also has 17" FACTORY tires with 3.21 rear end. if you have off road tires you
will loose some mpg, if u have 3.73 or 4.11 you will drop mpg. 95 % of
my drive is on the road the 3.6 is much better than my 07 jk, got about 14 mpg with off road tires i am 100% HAPPY and look
forward for the up coming diesel next year. enjoy ur day hope this helps.
04-16-2012 01:48 PM
OIIIIOersCreepers its a simple question, yet people still have to post stupid responses. no duh its a jeep, doesnt mean a man cant try/want to improve his mpg.

i agree, driving habit is monumental. also bec of the aerodynamics, highway speed is a major factor, all mathematical equations compound for every mph you increase. it is dramatic and certain threasholds, the jeeps seems to be at about 65mph.

now as far as mechanical suggestions, re-gearing is a possibility (not knowing what you have). some have claimed a better intake and/or exaust increases power which in turn with proper driving habits will improve mpg.

or you can tie a canoe on top for better aerodynamics like the one guy on here posted.
04-15-2012 08:17 PM
Posts On Percocet 12 jku, 33's no lift 3.21's has about 350 miles on it, got it with 129 still on first tank of gas, computer says I'm getting about 18....

I drive like a granny...not to save gas, just how I drive. If I want to haul ass, I do it in the 2012 GS vette
04-15-2012 06:21 PM
OkcWrangler I removed like 30 pounds of mud from under my Jeep. Probably like 1 MPG gained! ;-)
04-15-2012 05:37 PM
dow59037 My 2010 with the 3.8L 2 door has given me 21 MPG several times, that's interstate driving following the speed limit. I follow the speed limit are under and really watch the traffic ahead of me coast when I need to speed up slowly.

The biggest thing is I didn't buy my wrangler for mileage I bought it to have fun.
04-15-2012 04:21 PM
dkeven
2012 sport auto 18 inch sahara's 15-19 mpg

got a 2 1/2 inch lift, 18 inch Sahara wheels with oem tires, aftermarket front bumper and winch, driving on interstate sanely get 18 driving 80 ish get 15 driving to and from work back roads 60-65 get 17 all calculated at the gas pump on every fill up. Running regular gas a little over 4000 miles on it at the moment. a little better than my 1991 4.0 5 speed wrangler actually.
04-15-2012 03:39 PM
Redleg81
Quote:
Originally Posted by campman
For all those people posting and reading this.....I am looking to go up to a 275/70 (33's) and was wondering if anyone on here has this setup and was wondering how much mileage they lost?
I drive 20 miles round trip to work, mostly 40-45 mph, and averaging 18.5. Its a 2012 JKU sahara with 2000miles.
I lost about 2.5 mpg going to 33" duratracs (285/75/16) from stock 32" Highway MPG took a big hit! And tire size adjusted using procal....
04-15-2012 02:48 PM
BigMikeVP
Quote:
Originally Posted by campman View Post
For all those people posting and reading this.....I am looking to go up to a 275/70 (33's) and was wondering if anyone on here has this setup and was wondering how much mileage they lost?
I drive 20 miles round trip to work, mostly 40-45 mph, and averaging 18.5. Its a 2012 JKU sahara with 2000miles.
u'll prob lose about .5-1 mpg, 32's come stock on ur 12 sahara, depends how heavy the 33 is.
04-15-2012 02:33 PM
campman For all those people posting and reading this.....I am looking to go up to a 275/70 (33's) and was wondering if anyone on here has this setup and was wondering how much mileage they lost?
I drive 20 miles round trip to work, mostly 40-45 mph, and averaging 18.5. Its a 2012 JKU sahara with 2000miles.
04-14-2012 01:12 PM
taoshum
Quote:
Originally Posted by Scramble121 View Post
stock 2012 2d manual w 3.73. 1000 miles logged.
I'm getting 17.0 mpg in city only driving. (don't exceed 40MPH)... and I drive very light footed.

Couple of thoughts / questions... Do you get worse mpg while the engine is cold? My commute is only 2 miles one way. By the time i'm 3/4ths the way there in the morning, it completely warms up.

Second question:
Has anyone analyzed the mpg benefit (if any) for using ethanol free gasoline? There's an ethanol free gas station close to my house, but it's 15-20 cents more per gallon compared to a station that may contain up to 10% ethanol.
I get 18-19 but it's 5-6 miles to town. If you use ethanol free, up to 10%, you might see 3%-4% better if it's 10% ethanol. 1 gallon or gasoline is 1.25 Therms of energy; 1 gallon of ethanol is .81 Therms; pure ethanol has 65% as much energy as pure gasoline. A gallon of 10% ethanol, about 1.2 therms or 96.4 % that of pure gasoline. If pure gas is 15 cents out of $4, that's 3.7%; very close to even, energy wise... but... you don't have ethanol burning in your engine. Try it and let us know what happens, should get about 17.6 mpg with pure gas.
04-14-2012 09:52 AM
Dusthol I get worse mileage w fuel that has ethanol. I also see better mpg using the supreme gas. I averaged any where from 16 to 12 on a 1600 mile trip towing a light trailer. 12 mpg was w a check engine lite on. Best was w supreme gas.
04-13-2012 10:56 PM
Thracks Put masking/painters tape over the grille.

No, really.

Just keep an eye on your temp gauge.
04-13-2012 09:08 PM
GeckoJK
Quote:
Originally Posted by jeffk42 View Post
At this point most of the depreciation on the car has already occurred. I can sell it in several months for nearly as much as I paid for it, if not more since I got the thing for way under the KBB estimate.

In the meantime, it saves me a little over $11 per day in gas. And that's ONLY for the commute, not for any other travel (which I do a lot of). The monthly cost of the car, plus insurance, plus gas comes out to way less than $11 a day.

I'm not stupid. There's no need to insult me, especially with only a limited understanding of all of the variables.
The bad news is you have to drive a Corolla though instead of your Jeep.
04-12-2012 06:17 PM
pdubois64
Quote:
Originally Posted by ivel_86 View Post
Has anyone tried buying the "super chips" programmer for the 3.6L? If so does it help at all. After owning a few diesels I am proof that you can get decent miles out of a V8 diesle (I know different animal) but the programmers are the same principle. Thanks.
There is no tuner/programmer available yet for the 3.6L. I have never seen any MPG gains with a tuner on a gas engine, I believe the diesels do much better.

Averaging 16.3 in 900 miles with my 12 JK Sport auto 3.21's...all city stop and go.
04-12-2012 05:48 PM
Dave7200 My 2012 now has 2500 miles on it. I have a 4 inch lift that lifted it 5 and a half inches and 35's on it. I was getting a constant 13 mpg and have not yet had enough highway time to track the mileage. I took off the front driveshaft and it went up 1 mpg. I'm not stretching it that is actually what it went up. I figured I only need 4 wheel drive here in ND in the winter so I took it off for the summer.
04-11-2012 08:36 PM
Scramble121 stock 2012 2d manual w 3.73. 1000 miles logged.
I'm getting 17.0 mpg in city only driving. (don't exceed 40MPH)... and I drive very light footed.

Couple of thoughts / questions... Do you get worse mpg while the engine is cold? My commute is only 2 miles one way. By the time i'm 3/4ths the way there in the morning, it completely warms up.

Second question:
Has anyone analyzed the mpg benefit (if any) for using ethanol free gasoline? There's an ethanol free gas station close to my house, but it's 15-20 cents more per gallon compared to a station that may contain up to 10% ethanol.
This thread has more than 30 replies. Click here to review the whole thread.

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -5. The time now is 05:03 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC