post #1 of Old 08-04-2010, 04:28 PM Thread Starter
drowe303
Registered User
2007 JK Wrangler 
 
Join Date: Oct 2009
Location: charlotte
Posts: 228
Is my gas mileage normal?

I keep reading that people are saying their stock wrangler is getting like 18-22mpg. When mine was stock, I only got 16..

Now that I have 35s and a 2.5" lift, I get about 13mpg.
I have also read that people with 35's are getting as high as 18mpg. How is this possible.

I have an unlimited, Manual with 4:10 gears. Would 4.88 gears take my mpg up to around 18mpg?

I still have the air filter. If I replaced it with a K&N drop in, would it help some?

drowe303 is offline  
post #2 of Old 08-04-2010, 04:37 PM
mjelder
Registered User
1983 CJ7 
 
Join Date: Jun 2010
Location: indiana
Posts: 29
Sound sabout right to me. I've heard all that too, but i've had 4 different wranglers, 2.5's 4.0's 5 spds and automatics and i've had mileage all around those numbers. manuals get better mileage from what i've seen and the 4 cylinders do as well. throw on larger tires and you have a noticeable difference in mileage. I've gotten as low as 12mpg with 33's on a straight 6 5 spd and as high as 22 with stock wheels and a 4cylinder 5 spd. gotta remember, every jeep and engine is just a little different. so we all vary some. might change out a dirty air or fuel filter or perhaps run some carb or tank cleaner through your system. always seemed to help a little bit, even if it was just making me think it ran more efficiently haha.
mjelder is offline  
post #3 of Old 08-04-2010, 04:43 PM
owenswj
Registered User
2000 TJ Wrangler 
 
Join Date: Dec 2008
Location: Mississippi
Posts: 165
Yeh man, I get about 13.5 to 14 in the city. Mines stock too. The problem with mine is short stop and go trips everyday. The best I ever got was around 24 mpg's on a roadtrip from vegas to mississippi. That was the leg between flagstaff and albequerque with a tailwind. Most of the time highway sits around 17.5 to 19 if I'm lucky and thats not computer calculated. I do it the old fashioned way. Computer seems to be off sometimes.
owenswj is offline  
post #4 of Old 08-04-2010, 04:57 PM
Farmdiesel
Registered User
2007 JK Wrangler 
 
Join Date: Apr 2010
Location: NC
Posts: 37
Well it all depends on driving style. I think to get the 18-20 range, you have to drive with an easy foot and shift around 2500K or earlier. Of course terrain, stop and go, temps, etc all factor in. That being said I have a 6sp with 4.10s and have avg. around 19-20 stock and similar since a 2in coil lift. That's mostly hwy driving with 20-30 mile trips. Waiting to see how 33s will affect the mpg once they're added. I know people say don't drive a jeep for the miles per gallon (more like smile per gallon) , but I like to check my MPGs frequently to rule out any mechanical issues or changes in enginer performance. -YMMV
Farmdiesel is offline  
post #5 of Old 08-04-2010, 05:00 PM
ronjenx
Web Wheeler
 
ronjenx's Avatar
2008 JK Wrangler 
 
Join Date: Jan 2009
Location: Maine
Posts: 4,556
Quote:
Originally Posted by owenswj View Post
Yeh man, I get about 13.5 to 14 in the city. Mines stock too. The problem with mine is short stop and go trips everyday. The best I ever got was around 24 mpg's on a roadtrip from vegas to mississippi. That was the leg between flagstaff and albequerque with a tailwind. Most of the time highway sits around 17.5 to 19 if I'm lucky and thats not computer calculated. I do it the old fashioned way. Computer seems to be off sometimes.
The highs and lows quoted above are what I see with mine.
My lifetime average for my JK is around 18.5 mpg because "city" for the Bangor area does not include the kind of traffic jams people see in large cities.

The one time it went down to around 13 mpg, there was a lot of construction in town, requiring lots of stop and go.

I don't keep track when the fuel is burned off road. It might take the shine off the trip.
ronjenx is offline  
post #6 of Old 08-04-2010, 05:06 PM
DeepSky
Registered User
2007 JK Wrangler 
 
Join Date: Mar 2008
Location: Jax, FL
Posts: 1,956
FWIW I get about 13MPG mixed with 35s, 4.10s, 4" lift, and its a 4 door w/ the auto. I recently spoke with another JK owner in person with about the same setup and he reported 13MPG too so you seem to be in about the right spot.

2003 Patriot Blue Wrangler SE - RCX 2.5" Kit on 31x10.5 Firestone M/Ts and stock the rest of the way.
2007 Flame Red Wrangler Unlimited X - Skyjacker 4" Kit on 35x12.5 Cooper Discovery STT(My Build Details)
DeepSky is offline  
post #7 of Old 08-04-2010, 05:17 PM
RickyRedJK
Registered User
2010 JK Wrangler 
 
Join Date: May 2010
Location: Enterprise, Al
Posts: 36
2010 Unlimited Sport all stock (I know, shut up), 6spd, 3.73 rear end, P255/75R17, I have just over 5000 miles on it and have a running MPG average of 18.62 (calculated, not computer). My best mileage on a tank was just a bit over 20 MPG, and my worst tankful(s) was on vacation doing 70-75 on the interstate for hours at a time, and then it avg'd 16.8 MPG.

Given that I'm all stock, I would think, compared to some of the comments I've read here, i'd be a bit higher than 20ish on the highway without a lead foot...but, on the other hand I'm glad it still holds almost 17MPG at interstate speeds fully loaded w/passangers and wife's unholy amount of luggage.

YMMV.

Please go to this link and help me win a Nook book reader: http://is.gd/dwWWa
Download the free book too, great SCI-FI author.
RickyRedJK is offline  
post #8 of Old 08-04-2010, 05:21 PM
tennistom1
Registered User
2009 JK Wrangler 
 
Join Date: Aug 2006
Location: Left Coast
Posts: 922
2009 Rubi 4 dr 6 speed : mine = 16-19 hi-way.

2009 JK Rubicon 4-Door
2006 TJ Rubicon Unlimited
tennistom1 is offline  
post #9 of Old 08-04-2010, 05:23 PM
troy32323
Registered User
2010 JK Wrangler 
 
Join Date: Nov 2005
Location: Long Island NY
Posts: 249
2010 auto with 3.73 and stock tires. I am getting 20mph calculated including rush hour traffic every morning. I drive real easy and always cruise at 65.

My 05 TJ got about 17 until I put on Thornbirds that were almost the same size as stock and just the weight of the tires brought my mileage down to 12mpg. That is why my JK is still stock. I commute 60 miles a day and do not want to sacrafice mileage until it is no longer my daily driver.
troy32323 is offline  
post #10 of Old 08-04-2010, 05:33 PM
1222
Make mine a Jeep!
 
1222's Avatar
2012 JK Wrangler 
 
Join Date: Jul 2007
Location: Henderson
Posts: 13,239
Donít forget about the gas. Gas with ethanol (E10) burns up way faster than gas without.
1222 is offline  
post #11 of Old 08-04-2010, 06:40 PM
jstrubberg
Registered User
2009 JK Wrangler 
 
Join Date: Jul 2010
Location: Missouri
Posts: 2,124
2009 2 door, 35" tires and a 3" lift and I average 14.5 MPG. I plan to add a Superchips tuner and expect around a 1 MPG improvement.

Going to a higher gear ratio will likely give you worse mileage, not better.
jstrubberg is offline  
post #12 of Old 08-04-2010, 06:43 PM
JeffinWesternWA
Registered User
2010 JK Wrangler 
 
Join Date: Dec 2009
Location: SW WA
Posts: 948
Try to shift at about 2K~ rpm's, coast more into stops and smooth slow starts will add 1-2MPG to your number. Keep tires 2-3 lb over rec pressure. I've averaged OVER 20 MPG on first 3K miles of my JK w/ 6 sp/3.73's. Even got 23 mpg on highway on nice cool day at 65 mph level interstate. Keep the tires well inflated, the "junk" ota the Jeep and the idling to a minimum all will help...

JeffinWesternWA

Last edited by JeffinWesternWA; 08-04-2010 at 07:28 PM.
JeffinWesternWA is offline  
post #13 of Old 08-04-2010, 06:44 PM
TxJeepGuy2
Registered User
2007 JK Wrangler 
 
Join Date: Apr 2008
Location: North Texas
Posts: 260
Quote:
Originally Posted by DeepSky View Post
FWIW I get about 13MPG mixed with 35s, 4.10s, 4" lift, and its a 4 door w/ the auto. I recently spoke with another JK owner in person with about the same setup and he reported 13MPG too so you seem to be in about the right spot.
x - three

Bryan . . JKU 2007 (First Production Year)
- Jeep Green - Sahara -

3" lift - 35" Fierce Attitude M/T Tires
TxJeepGuy2 is offline  
post #14 of Old 08-04-2010, 06:48 PM
Shad
Registered User
2008 JK Wrangler 
 
Join Date: Dec 2007
Posts: 72
My four door Sahara automatic averages around 17-18 mph.
Shad is offline  
post #15 of Old 08-04-2010, 07:03 PM Thread Starter
drowe303
Registered User
2007 JK Wrangler 
 
Join Date: Oct 2009
Location: charlotte
Posts: 228
It seems as my mileage is normal then. Just to mention, I live in the city and drive in a lot of stop and go traffic. I do shift under 3k rpms and start off at lights fairly slow.
drowe303 is offline  
Reply

Tags
3.8L V6 , 35" tires , JK Wrangler , mileage , miles per gallon , mpg , wrangler


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Vibration, Bad Mileage, Very Bad Mileage Harley_Jeep_Man TJ Wrangler Technical Forum 10 09-04-2010 06:55 PM
what is a normal idle speed at the normal operating temp? tkwok YJ Wrangler Technical Forum 3 05-23-2010 08:28 PM
Fuel mileage help!! it cant be normal Iamjr TJ Wrangler Technical Forum 11 10-12-2009 09:34 AM
YJ gas mileage.... Normal? Bomac66 YJ Wrangler Technical Forum 14 01-28-2009 03:55 PM
mileage (not the normal) ram1500dodge TJ Wrangler Technical Forum 11 03-21-2008 02:22 PM

Posting Rules  
You may not post new threads
You may not 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 On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome