11 mpg - Page 2 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ 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 01-16-2013, 07:52 AM   #31
Jeeper
 
ClarksterYN's Avatar
 
Join Date: Dec 2012
Posts: 34
13 here as well in '05 LJ

ClarksterYN is offline   Quote Quick Reply
Old 01-16-2013, 07:54 AM   #32
Jeeper
 
Maro35089's Avatar
 
Join Date: Oct 2011
Posts: 141
I get around 18 with mixed highway and city. 97 TJ

Maro35089 is offline   Quote Quick Reply
Old 01-16-2013, 08:05 AM   #33
Jeeper
 
ClarksterYN's Avatar
 
Join Date: Dec 2012
Posts: 34
Quote:
Originally Posted by ClarksterYN
13 here as well in '05 LJ
I have 31's, 3.73; I have checked odometer with GPS and it is pretty close, maybe 1 or 2 mph off if that. Trip meter seems to be behind .05 to .08 each mile. No sure if PO did the gear swap. Air filter is good, going to do plugs soon. I thought it would do better.
ClarksterYN is offline   Quote Quick Reply
Old 01-16-2013, 08:46 AM   #34
Jeeper
 
lonestarLj's Avatar
 
Join Date: Jan 2013
Location: Carrollton, Tx
Posts: 33
Quote:
Originally Posted by ClarksterYN View Post
13 here as well in '05 LJ
What are you running? Because I get nowhere near 13 I barely get 10 with a 4inch lift 3.73 gears, 33's, and 4speed auto
lonestarLj is offline   Quote Quick Reply
Old 01-16-2013, 08:59 AM   #35
Jeeper
 
WVU Mountainman's Avatar
 
Join Date: Jun 2012
Posts: 837
Quote:
Originally Posted by SS Adrenaline

What is the engines most effcient power band RPMs?
I'd like to know this as well
WVU Mountainman is offline   Quote Quick Reply
Old 01-16-2013, 09:01 AM   #36
Jeeper
 
WVU Mountainman's Avatar
 
Join Date: Jun 2012
Posts: 837
I just checked and I have the 4 O2 sensors. Any way to tell if they need replaced or should I just replace all 4?
WVU Mountainman is offline   Quote Quick Reply
Old 01-16-2013, 09:10 AM   #37
Jeeper
 
WVU Mountainman's Avatar
 
Join Date: Jun 2012
Posts: 837
Also I drive on roads where the speed limit is 40-55. Could I just drop the auto tranny into 2 instead of D to help keep the engine at higher RPM's. tried this last night tach'd anywhere from 2100 - 2900 RPMs
WVU Mountainman is offline   Quote Quick Reply
Old 01-16-2013, 09:39 AM   #38
Commercial Member

WF Supporting Member
 
Big Sarge's Avatar
 
Join Date: Dec 2012
Location: Chester Virginia
Posts: 2,958
Just another thought (not to insult your intelligence) did you change the speedometer gear for your tires? I recently bought a Jeep and thought I was only getting about 12 miles a gallon. Went on a trip with my GPS an realized that my sppedo reads 55 when I'm doing 65. Did a calculation by the GPS mileage and realized I was closer to 16.
Big Sarge is offline   Quote Quick Reply
Old 01-16-2013, 10:37 AM   #39
Jeeper
 
ClarksterYN's Avatar
 
Join Date: Dec 2012
Posts: 34
Quote:
Originally Posted by Big Sarge
Just another thought (not to insult your intelligence) did you change the speedometer gear for your tires? I recently bought a Jeep and thought I was only getting about 12 miles a gallon. Went on a trip with my GPS an realized that my sppedo reads 55 when I'm doing 65. Did a calculation by the GPS mileage and realized I was closer to 16.
Which person are you talking too? My speedo is very close to GPS with 31s, not sure if my gear was changed.
ClarksterYN is offline   Quote Quick Reply
Old 01-16-2013, 11:32 AM   #40
Jeeper
 
WVU Mountainman's Avatar
 
Join Date: Jun 2012
Posts: 837
Quote:
Originally Posted by Big Sarge
Just another thought (not to insult your intelligence) did you change the speedometer gear for your tires? I recently bought a Jeep and thought I was only getting about 12 miles a gallon. Went on a trip with my GPS an realized that my sppedo reads 55 when I'm doing 65. Did a calculation by the GPS mileage and realized I was closer to 16.
I have not checked. I'm not sure if PO changed the gear or not. Ill put the GpS in there next time I drive and report back.
WVU Mountainman is offline   Quote Quick Reply
Old 01-16-2013, 05:16 PM   #41
Jeeper
 
NC Bear's Avatar
 
Join Date: Jun 2012
Location: North Carolina
Posts: 1,252
another way to check your spedo gearing is to drive exactly 1 mile one the Interstate (have to line up at mile marker and go to the next one and check with your trip reset.)
NC Bear is online now   Quote Quick Reply
Old 01-16-2013, 06:47 PM   #42
Jeeper
 
SurfKaster's Avatar
 
Join Date: Mar 2010
Location: St. Augustine FL
Posts: 1,350
I'd also check your break calipers. You might have one sticking. Also, O2 sensors can be pricey & if you don't have the cash to do all four I'd start with the two upstream. Rockauto carries them for a pretty decent price & stick with OEM.
SurfKaster is offline   Quote Quick Reply
Old 01-17-2013, 08:32 AM   #43
Jeeper
 
ChrisJeepTJ's Avatar
 
Join Date: Apr 2012
Location: Mystic, CT
Posts: 64
Quote:
Originally Posted by Powder Monkey View Post
I'd also check your break calipers. You might have one sticking. Also, O2 sensors can be pricey & if you don't have the cash to do all four I'd start with the two upstream. Rockauto carries them for a pretty decent price & stick with OEM.
I just checked rockauto for my '99 I6 and don't see any OEM sensors. I see ACDelco, Bosch, Denso, NTK, and a few others. They are all around $30 except for the AC Delco which are $60.

Any one have experience with these O2 sensors and which ones worked the best? Would you replace your O2 if you weren't getting a engine light/code?
ChrisJeepTJ is offline   Quote Quick Reply
Old 01-17-2013, 11:47 PM   #44
Jeeper
 
Join Date: Oct 2012
Posts: 51
Quote:
Originally Posted by Imped View Post
You do. The OP does not.
Virtually everything was CA emissions that year - 4 sensors.
03 TJX is offline   Quote Quick Reply
Old 01-18-2013, 01:05 AM   #45
Jeeper
 
K.wag's Avatar
 
Join Date: Oct 2012
Location: Roseburg, Oregon
Posts: 672
Quote:
Originally Posted by Big Sarge View Post
did you change the speedometer gear for your tires? I recently bought a Jeep and thought I was only getting about 12 miles a gallon. Went on a trip with my GPS an realized that my sppedo reads 55 when I'm doing 65. Did a calculation by the GPS mileage and realized I was closer to 16.
Wouldn't get your hopes up, going from 30s to 31s only changes about 3%... 3% of 10 means hes really getting 10.3. The relative statistical error is probably higher than that. Speedo won't create too much change until you are doing at least 33, 35 or larger.

Not to throw math in there, but 65 is about 118% of 55. 118% X 12 = 14.2 mpg. and what did you do have it off that much? 6" larger diameter tires?

I can't imagine any jeep on 31's should get less than 13-14 unless you are flooring it from stop light to stop light.
the lowest rpms in the highest gear should always produce the best gas mileage. Obviously you don't want to bog it down, but downshifting and having rpms in the 2k+ range won't give better gas mileage.
Each rpm = squirt of gas, +rpms = +gas
K.wag is offline   Quote Quick Reply
Old 01-18-2013, 02:24 AM   #46
Jeeper
 
paul65k's Avatar
 
Join Date: Nov 2012
Location: Lake Havasu City, AZ
Posts: 144
I recently saw 18.975 MPG on a recent trip from Reno to Vegas. Average speed was 74.2 MPH in my 06 Rubicon LJ Auto......stock gearing running 31's. My Jeep was on a progressive maintenance schedule until 12 months ago as it was owned and operated by the Government.

Hope this helps!
paul65k is offline   Quote Quick Reply
Old 01-18-2013, 09:25 AM   #47
Jeeper
 
WVU Mountainman's Avatar
 
Join Date: Jun 2012
Posts: 837
Checked with GPS. Almost dead on.

I'd hate to spend money on o2 sensors if its going to be the same. Are they worth changing if no CEL?
WVU Mountainman is offline   Quote Quick Reply
Old 01-18-2013, 11:28 AM   #48
Jeeper
 
K.wag's Avatar
 
Join Date: Oct 2012
Location: Roseburg, Oregon
Posts: 672
Quote:
Originally Posted by paul65k View Post
I recently saw 18.975 MPG on a recent trip from Reno to Vegas. Average speed was 74.2 MPH in my 06 Rubicon LJ Auto......stock gearing running 31's. My Jeep was on a progressive maintenance schedule until 12 months ago as it was owned and operated by the Government.

Hope this helps!
Thats freakin awesome! almost wonder what you would have gotten had you been driving 55 O.o

The best ive gotten was 21, but that was without the extra weight of the LJ, with 30" tires, 5 speed stick and gong 55-60. Most of the time i had 17-18.
With the 4" lift and 33's I get 15 around town, and 17 on all interstate
K.wag is offline   Quote Quick Reply
Old 01-18-2013, 11:35 AM   #49
Jeeper
 
Join Date: Feb 2012
Posts: 89
Quote:
Originally Posted by Dubs99sahara View Post
You might want to check your speed against a GPS. If there is a big difference between the Jeep speedo and your GPS indicated speed then your milage traveled will be off as well. The speedo gear may need changed to get an accurate assessment of your actual MPG.
I had an S10 with a 350 V8 and larger diameter tires and it was off 10 MPH and the MPG was much less because of the large tire diameter.
Dubs
With 31s, I had to add 8% to my trip odometer when I figured my Mileage.. That would still get you only about 12 MPG, I would also try O2 sensors like other posters have said.
Rooster21 is offline   Quote Quick Reply
Old 01-18-2013, 11:42 AM   #50
Jeeper
 
Join Date: Dec 2009
Posts: 108
Driving style is a huge factor in mpg that a lot of people do not acknowlege. If you are heavy on the pedal, race to get to the red light first and shift above 2,000 RPM then your mileage will always be low. Remeber, driving style is different from one person to another. If one says I am light on the pedal; that could be a world of difference from another person's version of light on the pedal. If you want good mileage out of a Jeep, then you will have to try hard because we all know it has the aerodynamics of a brick. I have 4.0L, 6 speed, 34" tires, 3.73 rear end and I can get 21 mpg if I try.
domano 68 is offline   Quote Quick Reply
Old 01-18-2013, 11:56 AM   #51
Jeeper
 
jeepinsc's Avatar
 
Join Date: Jul 2011
Location: Upstate SC
Posts: 37
'06 LJ I6,auto 13mpg all stock mostly city driving, My '03 TJ I6 auto got 19..go figure. took a trip with the TJ towing a 1000# trailer through mountains going 65-70 mph and got 16mpg.
jeepinsc is offline   Quote Quick Reply
Old 01-18-2013, 01:35 PM   #52
Jeeper
 
WVU Mountainman's Avatar
 
Join Date: Jun 2012
Posts: 837
I'm by no means heavy on the throttle. It's pointless To be heavy footed in my rig. its nothing near a sports car.

I drive like an old man. People get pissed at me how easy on the throttle I am. I still get 11 mpg pulling a trailer with 4 people inside or if unloaded by myself.
WVU Mountainman is offline   Quote Quick Reply
Old 01-18-2013, 01:37 PM   #53
Jeeper
 
WVU Mountainman's Avatar
 
Join Date: Jun 2012
Posts: 837
I swear I just can watch the gas gauge go down every time I drive
WVU Mountainman is offline   Quote Quick Reply
Old 01-18-2013, 02:58 PM   #54
Jeeper
 
tjjeepman2002's Avatar
 
Join Date: Jun 2012
Location: Cleveland
Posts: 1,015
Quote:
Originally Posted by WVU Mountainman View Post
I swear I just can watch the gas gauge go down every time I drive
Same here. I have 02 tj 4.0 with a 4" lift and 3" body with 35's i average 10 mpg. I however still have stock axles and not sure what the gears are.
tjjeepman2002 is offline   Quote Quick Reply
Old 01-19-2013, 01:39 AM   #55
Newb
 
Join Date: Nov 2012
Posts: 3
You may want to consider getting an ELM 327 OBD scanner (Bluetooth) and use an app on your cell phone to monitor real time mileage and trip average. I use an app for android called OBD Droid Scanner and it cost like $1.99. It will let you know what is killing your mileage and what you can do to increase mileage. It can also measure your speed as well. I average 20 mpg in my 2004 4.0.
Motor484 is offline   Quote Quick Reply
Old 01-19-2013, 09:55 PM   #56
Newb
 
Join Date: Apr 2010
Posts: 10
I had 4.0 5 speed with 4.56 gears and got 15 MPG when I lived in SC , but since I moved to FL I got 12.5. I have since swapped in a 5.9 with a 46RE auto and I still get almost 12.5 so I'm happy.
elmoe is offline   Quote Quick Reply
Old 01-20-2013, 04:36 AM   #57
Jeeper
 
Join Date: Jan 2013
Location: Central VA
Posts: 22
Quote:
Originally Posted by kcollins View Post
I'm getting about 15 1/2 to 16 mpg in my stock 4 cyclinder 95% of the time its city driving.

Same for me 15-16mpg.

Stock 1998 4-cyl 5pd on 31x10.50 Cooper Discovery STT. 70% hwy / 30% city (Hwy = 60-70).

My exhaust leak at the manifold might be causing O2 to read lean / setting fuel calc tables to run rich.

Whitfimb 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:
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.



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



logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 04:44 PM.



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