What mods are there to Increase mileage? - JeepForum.com
 76Likes
Reply
 
LinkBack Thread Tools
post #1 of 65 Old 12-13-2019, 03:34 PM Thread Starter
BlueFl.Wrangler
Supporting Member
 
BlueFl.Wrangler's Avatar
2002 TJ Wrangler 
 
Join Date: Aug 2019
Location: Inglis,Fl.
Posts: 172
What mods are there to Increase mileage?

Looking for ways to bump up the MPG on my machine. Right now its a bone stock 4.0 , manual , 3:07 axle ratio's

Not interested in headers. Thought about a C.A.I --Had some thoughts on performance chips / downloads but its kind of hard for me to grasp and believe that you can get added HP AND increased MPG.

Has anyone made changes that have made a significant difference?? (2-4 MPG)

BlueFl.Wrangler is offline  
Sponsored Links
Advertisement
 
post #2 of 65 Old 12-13-2019, 03:50 PM
Ironhead
Registered User
 
Ironhead's Avatar
2003 TJ Wrangler 
 
Join Date: Jan 2011
Location: Westchester
Posts: 4,952
forget about all of the bolt on nonsense, it's snake oil for a TJ.

the most effective way to gain mpg is to gear properly for the size tires you have. that will allow the engine to run the most efficiently with the least amount of effort.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Ironhead is offline  
post #3 of 65 Old 12-13-2019, 03:51 PM
Jo3Gee
Registered User
 
Jo3Gee's Avatar
2000 TJ Wrangler 
 
Join Date: Jul 2019
Location: Tampa
Posts: 79
In my opinion none of that will help. The best you can do is get back to like new. Make sure you have good compression, 49psi at the fuel rail, clean plugs, injectors, and air filter.
Jo3Gee is offline  
 
post #4 of 65 Old 12-13-2019, 05:55 PM
Shadowline
Registered User
 
Shadowline's Avatar
2003 TJ Wrangler 
 
Join Date: Jan 2006
Location: Greenville, SC
Posts: 148
.... a Tesla or a Prius.. take your pick, because your never gonna see 30mpg in a TJ
slickrock steve likes this.

2003 TJ 4.0 5-speed 31inch Goodyear Authority's, 2inch Rubicon Express Springs, Hella Vision Plus H/L's, IPF upgraded H/L wiring harness. JCR Offroad Stage 2 Frt Bumper with CocaCola Bottle opener, Smittybuilt XCR8 Winch, Rampage Bowless top.
Shadowline is offline  
post #5 of 65 Old 12-13-2019, 06:25 PM Thread Starter
BlueFl.Wrangler
Supporting Member
 
BlueFl.Wrangler's Avatar
2002 TJ Wrangler 
 
Join Date: Aug 2019
Location: Inglis,Fl.
Posts: 172
Quote:
Originally Posted by Shadowline View Post
.... a Tesla or a Prius.. take your pick, because your never gonna see 30mpg in a TJ
Last line of my post, the very end of the line--------- ( 2-4 MPG )
I know what I have and dont expect the power of a Koenigsegg Agera RS 1 or the gas mileage of my Honda Scooter--
BlueFl.Wrangler is offline  
post #6 of 65 Old 12-13-2019, 07:19 PM
mukluk
Web Wheeler
 
mukluk's Avatar
2000 TJ Wrangler 
 
Join Date: Oct 2010
Location: Clyde
Posts: 5,539
mukluk is offline  
post #7 of 65 Old 12-13-2019, 09:49 PM Thread Starter
BlueFl.Wrangler
Supporting Member
 
BlueFl.Wrangler's Avatar
2002 TJ Wrangler 
 
Join Date: Aug 2019
Location: Inglis,Fl.
Posts: 172
I had no idea folks on this would be so incensed about asking a simple question

Thanks to the first few folks that responded / helped
BlueFl.Wrangler is offline  
post #8 of 65 Old 12-13-2019, 09:54 PM
mukluk
Web Wheeler
 
mukluk's Avatar
2000 TJ Wrangler 
 
Join Date: Oct 2010
Location: Clyde
Posts: 5,539
I must be reading a different thread as I don't see anybody even mildly irritated, let alone incensed, about the questions posed.

2000 TJ SE
2005 LJ Rubicon
mukluk is offline  
post #9 of 65 Old 12-13-2019, 11:36 PM
Shark_13
Registered User
1998 TJ Wrangler 
 
Join Date: Dec 2012
Location: Post falls
Posts: 1,940
Garage
Light foot.
Keep it sub 65mph.
That's about it. Geared properly helps.
hubbabubba likes this.

Get out and explore.
Shark_13 is offline  
post #10 of 65 Old 12-14-2019, 05:01 AM
TheBoogieman
Democrat's 2020 NIGHTMARE
 
TheBoogieman's Avatar
2003 TJ Wrangler 
 
Join Date: Aug 2006
Location: charlottesHELL
Posts: 39,359
Quote:
Originally Posted by hubbabubba View Post
I had no idea folks on this would be so incensed about asking a simple question
It might have something to do with this in the FAQ.
p.s. Ignore my sig down below.

The "Dead Horses"- "Don't beat a dead horse." Many topics on this forum are considered dead horses that the majority of members are tired of discussing. These topics tend to clutter Page 1 of this forum and can cause more serious threads to be overlooked. They also waste storage space, which slows down the forum and hassles the webmasters. Every one of these topics can be answered by way of the SEARCH function.

Here is a small sample of Dead Horses:

-Tips for Better Gas Mileage...
-Cold Air Intakes
-Throttle Body Spacer
-Death Wobble
-The Gear /Tire/ speed /MPG thread
-What Axles do I have?
-What size tires will fit/How much lift?
-What your TJ will look like with various Tire/Lift Combos
-Whats size spare tire do I need?
-Auto vs Manual Transmission for off-roading
-TJ Forum FAQ's: Prepared by Wheelin98TJ
-Will Rubicon springs lift my TJ? If you still don't believe the engineers, here is a pic showing a stock Rubicon on 31" MTR's parked next to a stock 97 TJ on 31" Truxus tires.
-How do I...? - These questions will be covered in a later section with Write-Ups

If you do "Beat a Dead Horse" by starting a new thread, take cover. Which brings us to the next point...

Don't Banter- You may get an answer you didn't want to hear, or a comment that you felt was offensive. As Chris Rock would say: "Let it slide"
This forum is full of guru's and all around helpful guys, just take criticism with a grain of salt. No need to be quick to defend yourself or attempt to insult the poster. Honestly, they don't really care.
This thread is the perfect example of what NOT to do: Best/cost efficient way to gain HP and gas mileage
Additional Information: Rules and Guidelines
hubbabubba likes this.

Quote:
Originally Posted by jeepinmichguy_ View Post
TheBoogieman is a jerk.
03' Rubicon/Zone 4" coils with 1" spacers up front/Rancho shocks/5.13 gears-35" MTZs/BM brakes
99' XJ / 5.5" lift / Rancho shocks/33" DC Extreme country MTs. Jeep #18
TheBoogieman is offline  
post #11 of 65 Old 12-14-2019, 05:11 AM
hdsport
Registered User
2005 TJ Wrangler 
 
Join Date: Aug 2010
Location: Hills of Pa.
Posts: 434
Many years ago when I had my 2000 wrangler, 6cyl, std., I recall adding some Marvel Mystery Oil to the tank.
Don't remember the specifics, but I believe that I got a little better mpg ..........or maybe not.

When I get my '05 out of winter starage I'll have to try this again.
Gotta love to play even though you don't expect great results.

Maybe others have tried this.................great advertisement for MMO!!!!!!!!!!!!!!!
Maybe cure arthritis too......................
hubbabubba likes this.

2001 Winnebago Adv 32v MH
2008 Jeep GC , 2005 Willys
US Army Vet, 8th Army,
In God We Trust
hdsport is offline  
post #12 of 65 Old 12-14-2019, 06:44 AM Thread Starter
BlueFl.Wrangler
Supporting Member
 
BlueFl.Wrangler's Avatar
2002 TJ Wrangler 
 
Join Date: Aug 2019
Location: Inglis,Fl.
Posts: 172
Quote:
Originally Posted by TheBoogieman View Post
It might have something to do with this in the FAQ.
p.s. Ignore my sig down below.

The "Dead Horses"- "Don't beat a dead horse." Many topics on this forum are considered dead horses that the majority of members are tired of discussing. These topics tend to clutter Page 1 of this forum and can cause more serious threads to be overlooked. They also waste storage space, which slows down the forum and hassles the webmasters. Every one of these topics can be answered by way of the SEARCH function.

Here is a small sample of Dead Horses:

-Tips for Better Gas Mileage...
-Cold Air Intakes
-Throttle Body Spacer
-Death Wobble
-The Gear /Tire/ speed /MPG thread
-What Axles do I have?
-What size tires will fit/How much lift?
-What your TJ will look like with various Tire/Lift Combos
-Whats size spare tire do I need?
-Auto vs Manual Transmission for off-roading
-TJ Forum FAQ's: Prepared by Wheelin98TJ
-Will Rubicon springs lift my TJ? If you still don't believe the engineers, here is a pic showing a stock Rubicon on 31" MTR's parked next to a stock 97 TJ on 31" Truxus tires.
-How do I...? - These questions will be covered in a later section with Write-Ups

If you do "Beat a Dead Horse" by starting a new thread, take cover. Which brings us to the next point...

Don't Banter- You may get an answer you didn't want to hear, or a comment that you felt was offensive. As Chris Rock would say: "Let it slide"
This forum is full of guru's and all around helpful guys, just take criticism with a grain of salt. No need to be quick to defend yourself or attempt to insult the poster. Honestly, they don't really care.
This thread is the perfect example of what NOT to do: Best/cost efficient way to gain HP and gas mileage
Additional Information: Rules and Guidelines
Fair enough
BlueFl.Wrangler is offline  
post #13 of 65 Old 12-14-2019, 09:26 AM
rikkards
Web Wheeler
 
rikkards's Avatar
1998 TJ Wrangler 
 
Join Date: Jun 2008
Location: Ottawa
Posts: 4,595
Quote:
Originally Posted by hubbabubba View Post
Looking for ways to bump up the MPG on my machine. Right now its a bone stock 4.0 , manual , 3:07 axle ratio's

Not interested in headers. Thought about a C.A.I --Had some thoughts on performance chips / downloads but its kind of hard for me to grasp and believe that you can get added HP AND increased MPG.

Has anyone made changes that have made a significant difference?? (2-4 MPG)

Get the Honda Civic mod. Sadly you are driving a brick with a sail. Pretty much everything else mentioned is the best bet on how to minimize on burning gas
Freeagent27 likes this.

Machete don't tweet
- Machete
rikkards is offline  
post #14 of 65 Old 12-14-2019, 01:05 PM Thread Starter
BlueFl.Wrangler
Supporting Member
 
BlueFl.Wrangler's Avatar
2002 TJ Wrangler 
 
Join Date: Aug 2019
Location: Inglis,Fl.
Posts: 172
OK Fellas
Learned my lesson here

Dont need any more helpful tips on this-- got all I need

Thanks!!!!!!!!!
TheBoogieman likes this.
BlueFl.Wrangler is offline  
post #15 of 65 Old 12-14-2019, 01:30 PM
CJRoberts8812
Registered User
2002 TJ Wrangler 
 
Join Date: Feb 2016
Location: Tucson
Posts: 111
Quote:
Originally Posted by hubbabubba View Post
OK Fellas
Learned my lesson here

Don't need any more helpful tips on this-- got all I need

Thanks!!!!!!!!!
Part of the problem with these forums is that there isn't a "Sarcasm" emoji. I'm sure that nobody here is realistically suggesting that you get another vehicle, they're just trying to say that Jeeps get lousy mileage, and that you should pretty much get used to it.
Last year I made a road trip from Arizona to Ohio. Normally I get about 14 MPG. On my trip, I got 12! I asked what the problem might be and received real answers as to what might have happened, to "Just quit checking your mileage".
With 3.08 gears, you either need small, (factory) size tires, or gear to match the tire you have. Bottom line, there isn't anything you can mod on the engine to help. That's one of the reasons they stopped production of the 4.0, they've gotten everything they can out of it. After all, it's a 50 year old tractor engine.
CJRoberts8812 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

Log-in











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



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 On
Refbacks are On

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