reallly bad mpg in a stock jk - Page 2 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 05-02-2011, 12:59 PM   #31
Jeeper
 
redz1's Avatar
 
Join Date: Mar 2011
Location: Tallahassee, FL
Posts: 278
Quote:
Originally Posted by KooL View Post
Just checking but you didn't change to 32's right? They came on the Jeep when it was new?
Yep everything is stock.

I called jeep and they won't check it under warranty because 16.8 rounds to 17 which is within the estimated range. Jackasses.

Should I fight it or check another dealer? I've seen wranglers with city miles better then my highway, so I don't give a crap what the estimated range is.

redz1 is offline   Quote Quick Reply
Old 05-02-2011, 01:09 PM   #32
The Rogue Moderator

::WF Moderator::
 
Cons_Table's Avatar
 
Join Date: Aug 2009
Location: Ridgecrest, CA
Posts: 7,562
I would still track your MPG when you fill up. This will give you the most accurate reading, and also give you another number to compare your computer's reading to. It will also help determine if your computer's calculation is off. Then, if something appears wrong I would contact another dealer and see what they have to say...

Its a jeep...smiles per mile > miles per gallon

__________________
Poor Boy Racing The definition of the EVERYMAN Challenge!

Everyman Challenge XJ Build
Cons_Table is offline   Quote Quick Reply
Old 05-02-2011, 01:28 PM   #33
MARGARET, 10-14-51\6-1-12

WF Supporting Member
 
GREEN-MACHINE's Avatar
 
Join Date: Aug 2010
Location: PEOPLES REPUBLIC OF MASSACHUSETTS
Posts: 10,251
4 bucks a gallon,,,, ever think somebody is stealing you gas,,,, 12 bucks for a locking gas cap. jmo, and no i did not read all the post
__________________

life is too short to be taken seriously all the time,,,, go buy a MR.potato head and have some fun.
GREEN-MACHINE is offline   Quote Quick Reply
Old 05-02-2011, 01:36 PM   #34
The Rogue Moderator

::WF Moderator::
 
Cons_Table's Avatar
 
Join Date: Aug 2009
Location: Ridgecrest, CA
Posts: 7,562
Quote:
Originally Posted by GREEN-MACHINE View Post
4 bucks a gallon,,,, ever think somebody is stealing you gas,,,, 12 bucks for a locking gas cap. jmo, and no i did not read all the post
I have read a lot of posts saying that locking caps are a PITA. I have also heard that rather than siphoning gas, they are drilling holes in plastic tanks and draining them that way.

Either way, the OP checked his guage on a highway trip that he is taking...I would think he would have filled up before he left and then checked the reading two hours into that trip and was not pleased with his mileage? Might be hard to steal gas when hes on the road
__________________
Poor Boy Racing The definition of the EVERYMAN Challenge!

Everyman Challenge XJ Build
Cons_Table is offline   Quote Quick Reply
Old 05-02-2011, 01:38 PM   #35
Jeeper
 
redz1's Avatar
 
Join Date: Mar 2011
Location: Tallahassee, FL
Posts: 278
Quote:
Originally Posted by GREEN-MACHINE View Post
4 bucks a gallon,,,, ever think somebody is stealing you gas,,,, 12 bucks for a locking gas cap. jmo, and no i did not read all the post
Unless someone can siphon gas on a 2 lane highway going 70 mph... Please disregard this guys post
redz1 is offline   Quote Quick Reply
Old 05-02-2011, 01:57 PM   #36
Jeeper

WF Supporting Member
 
jk'n's Avatar
 
Join Date: Jan 2009
Location: First Quadrant in the Land of the Free
Posts: 4,790
I just came back from a trip from MA to PA and back towing about 1500 lbs in an open utility trailer. I averaged 16.5 for the whole trip.
__________________

Participate in life....Keep movin'....Go there....JK'n it.........Do it! Jeep #1: Red Rock 08 JK Rubicon 4dr, 6 sp manual, Stock Mud Tires, MyGIG Upgrade, Hard Top, after sale BestTop SunRider Soft Top, Congo Cage Rack, Mopar slush mats Jeep #2 Black 08 JK Rubicon 2dr, 6 sp manual, both tops, some chrome...uggg (my wife's jeep) Jeep #3 White 92 YJ (my son's jeep) A great quote from a good friend: "All hail click clack and master jk'n." Click and clack are my idols!
jk'n is offline   Quote Quick Reply
Old 05-02-2011, 01:57 PM   #37
MARGARET, 10-14-51\6-1-12

WF Supporting Member
 
GREEN-MACHINE's Avatar
 
Join Date: Aug 2010
Location: PEOPLES REPUBLIC OF MASSACHUSETTS
Posts: 10,251
Quote:
Originally Posted by redz1 View Post
Unless someone can siphon gas on a 2 lane highway going 70 mph... Please disregard this guys post
LIKE I SAID, i did not read all the post. so shame on me,,, i was just offering my opion..
__________________

life is too short to be taken seriously all the time,,,, go buy a MR.potato head and have some fun.
GREEN-MACHINE is offline   Quote Quick Reply
Old 05-02-2011, 02:07 PM   #38
Jeeper
 
redz1's Avatar
 
Join Date: Mar 2011
Location: Tallahassee, FL
Posts: 278
Quote:
Originally Posted by jk'n View Post
I just came back from a trip from MA to PA and back towing about 1500 lbs in an open utility trailer. I averaged 16.5 for the whole trip.
I'm towing nothing and getting similar mpg. See my concern?

I'm filling up gas now so I'll calculate it from here on manually
redz1 is offline   Quote Quick Reply
Old 05-02-2011, 02:07 PM   #39
Jeeper
 
Join Date: May 2005
Location: Lake Winola, PA
Posts: 264
id say your readout is messed up or you really are getting bad mileage.
now this is on my readout so i know its not right but it has to close but on a recent 3 hr trip 99% highway i read out about 23mpg with a 4 door rubi, stock tires, smitty built front bumper, superchips set on towing, cruise the whol etime set at the speedlimit. i think you shoul dbe getting better. are you running doors/top?
__________________
07 Unlimited Rubi,Rock Krawler,RCV,Reid,RiverRaider,TenFactory,PolyPerfor mance,Yukon,Fox
BeerMonkeY is offline   Quote Quick Reply
Old 05-02-2011, 02:09 PM   #40
Jeeper
 
Join Date: Apr 2011
Posts: 62
I would try a highway run at 65 and another at 60 MPH. I bet there is a fair bit of improvement down at 60, but there may be a sweet spot you can zero in on that you can live with for highway speed between 60 and 70 MPH.
ModernProspector is offline   Quote Quick Reply
Old 05-02-2011, 02:25 PM   #41
Jeeper
 
JeeperJake's Avatar
 
Join Date: Jul 2010
Posts: 2,894
I don't know on the random drilling of gas tanks.

Looking up at mine from under the skid plate, there is mighty few accessibility points where a bit would even fit!

There's a couple holes but you'd have to climb under there and spot-locate your drill point, as about 99 % of the tank is metal covered.
__________________
get in--buckle up--hang on
"soothing agricultural implement/personal servant/Walter Mitty multidimensional access utility device conveniently travels on pavement when necessary and often keeps me warm/cool/dry/soothed as needed."
JeeperJake is offline   Quote Quick Reply
Old 05-02-2011, 05:25 PM   #42
Jeeper
 
redz1's Avatar
 
Join Date: Mar 2011
Location: Tallahassee, FL
Posts: 278
I just calculated my gas manually.

The meter says 16.1 mpg
My calculations gave me 14.2 mpg.
75 Mph, soft top up, 2 doors... Cruise control the whole way

the dealership has to be kidding me if they don't check this under warranty.
redz1 is offline   Quote Quick Reply
Old 05-02-2011, 06:00 PM   #43
Jeeper
 
d3digit's Avatar
 
Join Date: May 2010
Location: Aliso Viejo Ca.
Posts: 150
in one year on my 2010 JKU stock I eco average 15.5mpg but had never got over 17.8(on highway)
__________________
/l ,[__],
l---L []lllllll[]-
()_) ()_)----)_)
d3digit is offline   Quote Quick Reply
Old 05-02-2011, 07:40 PM   #44
Jeeper
 
Join Date: Apr 2011
Posts: 62
Quote:
Originally Posted by redz1 View Post
I just calculated my gas manually.

The meter says 16.1 mpg
My calculations gave me 14.2 mpg.
75 Mph, soft top up, 2 doors... Cruise control the whole way

the dealership has to be kidding me if they don't check this under warranty.
At 75 MPH your mileage is toast in a Wrangler, probably in any combo.

Mpg For Speed - Fuel Efficiency Vs. Speed
ModernProspector is offline   Quote Quick Reply
Old 05-02-2011, 08:32 PM   #45
Jeeper
 
Join Date: Oct 2010
Location: The Pacific Northwest
Posts: 356
Images: 21
I get better gas mileage in my gas-guzzling 402ci Corvette than I do my Jeep.

But then again, I am certain my Speedometer has not been reset to compensate for family-sized flotation devices, know as ProComp X-Terrains.

What I did to really get a better understanding of fuel efficieny (or in this case, a serious lack of) was fill up until the gas pump stopped and saved the receipt. Then I filled up over a period of 3 months as a good foundation of driving....Take all receipts and add up all the gallons added into your Jeep over 3 months, then divide your 3 months miles driven by how many gallons used in 3 months. That is a good 3 month basis for mileage.

Mine sucked.

12 mpg at best, but again, that is without the Speedo being corrected for the 325/60/18s hunkering down the ride. What a surprise it would be if the Speedo WAS corrected! Hahahahahaha......
__________________

"It's a Jeep thing - I don't even understand"
JackdUp is offline   Quote Quick Reply
Old 05-03-2011, 06:42 AM   #46
Jeeper

WF Supporting Member
 
jk'n's Avatar
 
Join Date: Jan 2009
Location: First Quadrant in the Land of the Free
Posts: 4,790
I got better mpg on my Sahara unlimited stock averaging about 20. The Rubicon Unlimited averages 18.5 when nothing is in tow and that is with my roof rack. Without the roof rack it goes up to 19.
__________________

Participate in life....Keep movin'....Go there....JK'n it.........Do it! Jeep #1: Red Rock 08 JK Rubicon 4dr, 6 sp manual, Stock Mud Tires, MyGIG Upgrade, Hard Top, after sale BestTop SunRider Soft Top, Congo Cage Rack, Mopar slush mats Jeep #2 Black 08 JK Rubicon 2dr, 6 sp manual, both tops, some chrome...uggg (my wife's jeep) Jeep #3 White 92 YJ (my son's jeep) A great quote from a good friend: "All hail click clack and master jk'n." Click and clack are my idols!
jk'n is offline   Quote Quick Reply
Old 05-03-2011, 08:59 AM   #47
Jeeper
 
El Gringo's Avatar
 
Join Date: Apr 2011
Location: Buda, TX
Posts: 771
My read out is close, but never accurate, or consistent.
I always fill it up til I can see gas sitting in the neck, so I know its always filled to the same amount. My meter said earlier 16.4, manual was 19.8. The other day it was 19.2 and 17.8, respectively. Before that it was 18.5 and 15.2, resp. So the meter may lie. alot. I changed my oil at 2200mi and saw a significant gain in MPG, probably 30%. My parents have a '10 as well and they get about 23.5 Hwy, all stock 2 dr sport, @ 70 mph. I'm jealous.
El Gringo is offline   Quote Quick Reply
Old 05-03-2011, 09:56 AM   #48
Jeeper
 
vze2372e's Avatar
 
Join Date: Feb 2010
Location: Boston, MA
Posts: 375
35's, 6spd, 5.13gears - 11.5-12.2 consistently around town, 15.6-15.8 highway at 65, 2850 rpm, cruise control, hills of Worcester. On flat ground, highway I just break 16 - my rig has been corrected with the ProCAL Module
__________________
2010 Rubicon 6spd - 35" Mud Countrys, 4" RC X Series Lift, Tom Woods Driveshafts, 5.13 gears, ARB Diff Covers, River Raider Breathers, AEV Snorkle, AEV ProCal Module, 12.5k Winch - Drive it like you stole it
vze2372e is offline   Quote Quick Reply
Old 05-10-2011, 05:05 AM   #49
Newb
 
Lisa97's Avatar
 
Join Date: May 2011
Posts: 8
Send a message via AIM to Lisa97
my 97, all stock (excepting I changed to 33's from stock 32's) averages around 21 consistently city/county (I'm rural and don't do much inner city driving). not much better on the interstate averages about 24mpg @ 65mph.
Lisa97 is offline   Quote Quick Reply
Old 05-10-2011, 07:35 AM   #50
Jeeper
 
sprtplt11's Avatar
 
Join Date: Apr 2011
Posts: 81
Quote:
Originally Posted by El Gringo View Post
My parents have a '10 as well and they get about 23.5 Hwy, all stock 2 dr sport, @ 70 mph. I'm jealous.
No, they don't. Unless by "about" you mean 19.5.
sprtplt11 is offline   Quote Quick Reply
Old 05-10-2011, 10:59 PM   #51
Jeeper
 
ChaseRedJK's Avatar
 
Join Date: Oct 2010
Location: Kansas
Posts: 406
Quote:
Originally Posted by redz1 View Post
So lately my ECO meter has been saying im at about 11mpg. Granted I'm all city miles, I dont have a lead foot so I figured something smelled fishy. I've seen wranglers on 34's with at least 15 mpg.

So I conducted a test. I reset my ECO meter and drove down a straight road ON CRUISE CONTROL for about 5 miles at 35 mph. My ECO meter read 13 mpg.

On cruise control, down a straight road, at 35 mph... shouldn't I expect better then 13 mpg?

Then I hit a red light. 5 minutes sitting at the red light and my mpg dropped to 11.2 mpg. I understand I'm wasting gas sitting in one spot so my mpg would drop because I'm basically going 0 miles, but SO MUCH?! I was sitting at a red light!

I have a 2010 JK with 3500 miles. Is something fishy here, or is it just that I live in a college town with stop/go traffic at 35mph (at most) and parking garages every day?

Its terrible that the leaders of our country don't protect our American dream. Instead of just enjoying our Jeeps we have to worry about mpg's... its ridiculous. Although 11 and 13 sound terribly low man
__________________
Chase
2014 JKR - Flame Red - Ordered - 2.10.14
2007 JK - Flame Red - Sold - 2.9.14
ChaseRedJK is offline   Quote Quick Reply
Old 05-10-2011, 11:07 PM   #52
Jeeper
 
themoneypit's Avatar
 
Join Date: Apr 2011
Posts: 517
Someone in another thread stated they found their tire pressure was at 20 instead of 32 or so and he had a similar mpg drop to yours, just a thought.
themoneypit is offline   Quote Quick Reply
Old 05-13-2011, 01:26 PM   #53
Newb
 
Join Date: May 2011
Posts: 83
#1. Do not freak out about mileage until you are sure your speedometer is accurate, the easiest way to check this is with a GPS unit. If your off by only one or two mph that will significantly effect mpg. It is not uncommon for stock units to be off by 2-3 mph. Throw on larger than stock tires and it gets worse from there.

#2. Gas quality varies..In my part of the country, the midwest, they use winter and summer gas blends, I see a around a 3 mpg drop on the summer blend, or any blend with ethanol.

#3. An aggressive tread compound tire of the exact same diameter will drop mileage....its all about rolling resistance. High MPG tires are very hard compounds with light tread. A tire always gets its best mpg when it is wore out.

#4. Double check that a mouse or bird has not built himself a nest in your air intake tube, this is very common. Remove the entire assembly and look through it to be sure.

#5. There are three main things I see wrong with your situation.
#1, these Jeeps take around 10k miles to be broken in and obtain peak fuel mileage, JP Magazine did a story on in when the editor bought a new 07, power and fuel mileage were horrible for the first few thousand miles, to the point he talked to Jeep engineers about it.
#2. City driving, I spent 10 years as a police officer and we would get around 9 -10 mpg in our crown vics while patrolling around town. If we went on a prisoner pick up that was hunderds of miles away, it was nothing to see 20+ mpg, more than double, so it is not unreasonable to get that kind of mileage in the city.
#3. You are driving way too fast to obtain peak mileage in a vehicle that has no aerodynamics to it. I have been driving Jeeps for almost 20 years now, and they do not do well much over 60 mph....the power to propel a vehicle through the wind rises exponentially with mph. Awhile back guys were trying to get some sport bikes over the 200mph level. Stock at around 150 hp they would do 170 mph....as they raised the hp levels, the speed only slowly crept up...to the point they were pushing well over 250hp with turbos to try to get over 200mph...and they basically said that once you get over a certain speed, it takes more and more hp to increase a single mph due to wind resistance. My point is, while an increase from 60mph to 75 mph may only be 10% or less, the increase in power and fuel burned is probably closer to 20% more.

#6. These Jeeps are underpowered. How many of you have heard that a 4cyl TJ gets worse mileage than a 6cyl TJ? Why?, because the 4cyl has to work that much harder to move the Jeep around, even though if they were both removed from the vehicles and ran on an engine stand, the 4cyl would use less fuel per hour than the 6cyl. You need to tailor your driving to suit the vehicle. No full throttle starts, try to gain speed more slowly and not use all of the vehicles available power all of the time. This relates to the gearing issues guys were talking about earlier...take a 10 spd bicycle for example...lets say it takes you 100 calories to travel 1 mile at a certain gear setting, if you alter that setting to make your workload easier, you can travel further on less calories burned because you are exerting less energy to propel yourself. Now there is a time penalty with this, as nothing is free when it comes to energy. When you gear down, you slow down, so if you attempt to cover that mile in the same amount of time as before, you may burn more energy because your a working faster even though you are not exerting as much pedal pressure.

#7. While I dont know how sophisticated the JK system is, I know a lot of newer vehicles computer also learn your driving style and sets parameters based upon that, so it will take some time for it to relearn after you alter your driving style. So you really cannot judge until you have driven some miles being easy on it. I.E. if you spend 200 miles driving like a top fuel dragster pilot, then drive 5 miles normal, I dont think you will see the same results as if you had driven the last 200 miles like a grandma.

#8. If fuel mileage, wind noise, leaks, creaks, squeaks, shimmys, or noises bother you too badly, then you will be much much happier with a Honda or Toyota. I have sold a lot of family members Jeeps in my life, and the ones that have gotten out of something like an Acura or Honda and into a Jeep have always been unhappy. The ones that traded in a old beater pick up truck have always been thrilled. If you don't spend at least 75% of the time (weather permitting) with the top and doors off, you will hate the Jeep. I know people who never take the top off and hate their Jeeps.....they say..."One good day in Jeep with the top off, makes up for all of the rest of the days with the top on." So don't set your expectations too high, understand these things are essentially pieces of junk that leak, squeak, rattle, and creak......
Jared1956 is offline   Quote Quick Reply
Old 05-13-2011, 02:27 PM   #54
Jeeper
 
JIMBOX's Avatar
 
Join Date: Nov 2009
Posts: 9,914
Heh Heh, sorry and this'll really frost ya

30 mile run at 60 mph--5.38 gears/auto/O/D--



Of course it's not written in stone, but I did a "MATH" check when it read 18.2 mpg and the actual (this week) was 17.53 mpg--

You need Dealer action !!

Chao

JIMBO
__________________
"ya gotta have class"
JIMBOX is offline   Quote Quick Reply
Old 05-15-2011, 04:52 PM   #55
Jeeper
 
Join Date: Apr 2011
Posts: 62
Last weekend I drove 100 km touring neighbourhoods at 50 to 60 km/h (30 to 37 mph) the whole time and got 12.4 L/100 km average (19 mpg). Stock 2011 Rubicon, family onboard. That's pretty much normal logging road travel speeds, so that makes me happy.

MP
ModernProspector is offline   Quote Quick Reply
Old 05-16-2011, 07:52 PM   #56
Jeeper
 
El Gringo's Avatar
 
Join Date: Apr 2011
Location: Buda, TX
Posts: 771
Quote:
Originally Posted by sprtplt11 View Post
No, they don't. Unless by "about" you mean 19.5.
No I mean 23.5 miles per gallon. Learn to read.
__________________
1977 CJ5
El Gringo is offline   Quote Quick Reply
Old 05-24-2011, 09:17 PM   #57
Jeeper
 
El Gringo's Avatar
 
Join Date: Apr 2011
Location: Buda, TX
Posts: 771
Why must my PCM lie to me?



I laughed when I saw this. Then I hand checked it. 23.7 MPG!!! Amazing what actually driving with a tailwind (30mph) will do instead of driving into it. This is even at 70-80 MPH for 100+ Mi.
__________________
1977 CJ5
El Gringo is offline   Quote Quick Reply
Old 05-24-2011, 11:38 PM   #58
Jeeper
 
weakkneewillie's Avatar
 
Join Date: May 2011
Location: Kingston Pa
Posts: 355
Im at about 18.5 after 6 tanks mostly highway all stock....Ill take it!!!
weakkneewillie is offline   Quote Quick Reply
Old 05-24-2011, 11:55 PM   #59
Jeeper
 
4 Jeep Family's Avatar
 
Join Date: Nov 2010
Location: WI / IL State line
Posts: 98
Images: 2
All stock 2011 4 door Sahara KJ 17.5 city 22.5 HWY.
4 Jeep Family is offline   Quote Quick Reply
Old 05-25-2011, 07:38 AM   #60
Jeeper
 
sprtplt11's Avatar
 
Join Date: Apr 2011
Posts: 81
Quote:
Originally Posted by Scooter_Trash View Post
You don't have horrible gas mileage, you are getting what Jeep says you should be getting. 15mpg city/19 hwy.
Exactly. These peeps claiming 18, 19, 20 mpg "city" are dreaming. Not in any kind of driving I would call city will any post 2007 Wrangler get that kind of mileage.

sprtplt11 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

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:
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.



Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hooking aftermarket horn up to stock YJ horn switch. . .wiring diagrams??? atomicjoe23 YJ Tech Forum 5 11-07-2012 07:06 AM
IL: Set of 5 Stock 15 inch wheels for sale/ also stock bumper sale crikeyjeepturtles Classifieds Archive 28 05-19-2011 10:48 AM
axle build from east coast gear supply AdrenalineJunky45 Builders Corner 29 03-23-2011 09:15 PM
Things u havd done on a stock jeep or close to stock? blackhawk General Jeep Discussion 4 03-12-2011 01:32 AM
Budget sound improvement on STOCK Radio and Speakers jrohan07 JK General Discussion Forum 13 02-03-2011 03:16 PM



Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 12:23 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