Gas Mileage - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > Engines & Drivetrain > Gas Mileage

Rough Country Lift Kits and Parts!Dan's Old as Dirt Birthday Sale!Premium LED Lighting by VISION X, Proudly sold at ROCKRIDG

Reply
Unread 05-31-2007, 07:56 PM   #1
Black03TJ
Registered User
 
Join Date: Apr 2007
Location: South MS
Posts: 14
Gas Mileage

I'm looking to max out gas mileage on my jeep and willing to spend the money to do it. I have an '03 Wrangler Sahara with 31" BFG AT's. I'm getting a little more than 16 MPG with this set up. I've heard of several things that will possibly increase the mpg (intake, exhaust, header, etc... ) wanted some suggestions especially if you have one of these upgrades.

__________________
[B]UNDER CONSTRUCTION[/B]
Black03TJ is offline   Reply With Quote
Unread 06-01-2007, 11:16 AM   #2
curtjames37
Registered User
1998 XJ Cherokee 
 
Join Date: Aug 2006
Location: Oklahoma City, OK
Posts: 486
Save the money you are going to spend on these mods and put them into the tank. The mileage gains are so small with the mods you mentioned that it will take a long time for them to pay for themselves let alone save you money.

I don't know what the stock gear ratio or stock tire size is on a TJ but it is possible that the 31s are stealing a few MPGs.
curtjames37 is offline   Reply With Quote
Unread 06-01-2007, 11:41 AM   #3
KrazyGimp
Registered User
1982 CJ5 
 
Join Date: Jun 2006
Location: Yakima, WA
Posts: 1,200
I really doubt that you are going to see anything much above 16. I wish my motor was even close to that. As stated above, those mods will not get you where you want, and if you just go bolting on random parts that are not matched together you can hurt your millage instead of help. Maybe find a gear ratio calculator (go to www.4lo.com) and mess around with that to see what you can do with your gearing, but don't get too exited.

You are driving a Jeep after all, not a Civic.
__________________
1982 CJ-5 Laredo 258, T-176, D-300
1972 240z in pieces...

Quote:
Originally Posted by BESRK
...that's why you push in that little nipple (hehe.. I said nipple on the internet :D )
KrazyGimp is offline   Reply With Quote
Unread 06-01-2007, 11:53 AM   #4
Test
Registered User
2007 WK 
 
Join Date: Oct 2004
Location: Grand Forks, ND
Posts: 373
Want to max out your mileage? Buy a Toyota Prius.
Test is offline   Reply With Quote
Unread 06-01-2007, 01:55 PM   #5
RockScar
Registered User
1984 CJ7 
 
Join Date: May 2007
Location: MD
Posts: 245
I get 15.5 in my 84 cj7 on 33's and 4.10 gears and basicly stock 4.2. Ha!
RockScar is offline   Reply With Quote
Unread 06-03-2007, 06:39 PM   #6
gearheadjlm
Registered User
1998 TJ Wrangler 
 
Join Date: Apr 2007
Location: Camp Lejeune, NC From Ohio
Posts: 257
Quote:
Originally Posted by Black03TJ
I'm looking to max out gas mileage on my jeep and willing to spend the money to do it. I have an '03 Wrangler Sahara with 31" BFG AT's. I'm getting a little more than 16 MPG with this set up. I've heard of several things that will possibly increase the mpg (intake, exhaust, header, etc... ) wanted some suggestions especially if you have one of these upgrades.
I managed to get 20mpg today. That was A/C off, 5th gear, 2200 rpm, level ground, cruise set at 70mph, for 200 miles. This is a first ever for me. There was one time through west virginia on I77 I averaged 14.5, most of the time around 16, 17 if I am lucky. This is stock 4.0, stock gears, and 32x11.5 tires. This is calculated by topping off tank, setting trip, then at next top off, dividing gallons by miles....

I'm wondering if this engine properly built with a turbo would do better....
gearheadjlm is offline   Reply With Quote
Unread 06-04-2007, 07:33 PM   #7
heywaitfourme
Registered User
 
Join Date: Dec 2005
Location: Johnstown, Pa
Posts: 155
20ish here, but I only run around town, with 31's, stock gears and a 4.6 stroker. Good luck getting something to be happy about if you drive the highway.
__________________
2011 Grand Cherokee 4x4 black on black w/hemi
heywaitfourme is offline   Reply With Quote
Unread 06-10-2007, 05:13 PM   #8
DamianDeBe
Registered User
 
Join Date: Nov 2006
Location: Hoboken, NJ
Posts: 283
Quote:
Originally Posted by heywaitfourme
20ish here, but I only run around town, with 31's, stock gears and a 4.6 stroker. Good luck getting something to be happy about if you drive the highway.
Actually, highway mileage should be much better that in stop and go traffic, unless you are flooring it all the way. I see at least a 4 mpg increase in milage on the highway.
DamianDeBe is offline   Reply With Quote
Unread 06-10-2007, 08:16 PM   #9
4.7stroker
Registered User
1988 YJ Wrangler 
 
Join Date: Apr 2007
Location: Rio Rancho NM
Posts: 4,299
Funny my milage goes down 1mpg on the highway????
I average 16mpg in town and if I keep it at 60 on the highway (which I don't)
4.7stroker is offline   Reply With Quote
Unread 06-10-2007, 08:37 PM   #10
curtjames37
Registered User
1998 XJ Cherokee 
 
Join Date: Aug 2006
Location: Oklahoma City, OK
Posts: 486
Aerodynamics are a *****.

curtjames37 is offline   Reply With Quote
Unread 06-14-2007, 04:36 PM   #11
aszalan
Registered User
2000 TJ Wrangler 
 
Join Date: Oct 2006
Location: Fayetteville, AR
Posts: 435
buy a scanguage II and see if you change the way you drive, accelerate, etc makes a difference
aszalan is offline   Reply With Quote
Unread 06-14-2007, 05:19 PM   #12
flatlander757
Registered User
2003 TJ Wrangler 
 
Join Date: Nov 2006
Location: Dayton, Ohio
Posts: 5,427
Wranglers are about as aerodynamic as a barn, I wouldn't expect great highway mileage, best would be probably cruising around 2600rpms at 60mph with cruise control on... it's way steadier than your right foot
flatlander757 is offline   Reply With Quote
Unread 07-04-2007, 12:40 PM   #13
AJE
Registered User
 
Join Date: Feb 2007
Location: Ohio
Posts: 28
The only thing I really did to my XJ is a poor man's cold air intake. I'm not sure if it helped or not.

The other big thing is keeping your tires inflated to the correct psi. You ever tried to pedal a bike with low tires?
AJE is offline   Reply With Quote
Unread 07-04-2007, 01:23 PM   #14
ElvisV04290
Registered User
1990 YJ Wrangler 
 
Join Date: Mar 2006
Location: Macomb, Illinois
Posts: 1,329
fold your windshield down, and get some ski goggles
__________________
1990 YJ, Colorado Red with 'Laredo' markings, 4.2L, TF999, NP231, Valvoline Syn fluids, Weber 32/36, Nutter Bypass, Dana 30/35, 16" Electric Fan, Optima Yellow Top, 140amp alt., K&N Air Filter, Cherry Bomb muffler, SRC Front Bumper, CH&F Shackles, KC 100w Daylighters, Homemade Lightbar, Rear Aux lights, Cobra CB/PA/WX, 102" Whip Ant., 400 watt power inverter, 2 fire extinguishers, Mobile Internet & WiFi equipped.
Daily Driver since April 23rd, 2003

Northern Illinois Extreme Jeep Club Member www.extremejeepclub.com
Weber 32/36 Install -> http://www.jeepforum.com/forum/f12/weber-32-36-install-write-up-382309/
Early YJ Club Member #37
For anyone with a 4.2L --> http://groups.jeepforum.com/258s_Unite
ElvisV04290 is offline   Reply With Quote
Unread 07-09-2007, 11:04 PM   #15
bobbert350
Registered User
 
Join Date: Mar 2006
Location: bucks county, pa
Posts: 2,932
yea id say also save ur money any mpg u get out of it will take forever to recoupe the money you spent on them....you gotta stop thinking miles per gallon and think fun per gallon...i get ****ty gas mileage 12 around town 13 on the high way but i dont care i get a heck of a lot of fun per gallon....
__________________
88 jeep wrangler, 4.2, auto---cragar soft 8's, d35 locker, bucket seats with 5 point harnesses, warn bumper w/ grill gaurd, winch plate, kc daylighters, light bar, herc the interrior, rebuilt tranny (yay) with tranny cooler, winch and msd ignition, 3.5 inch fabtech lift, currie boomerang shackles f/r, weber carb...[B]

[B]Why only go anywere fast when you can go anywhere[/B]
bobbert350 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.