Holy MPG!!!!!!!!!! - Page 2 - JeepForum.com

Reply
 
LinkBack Thread Tools
post #16 of 37 Old 05-21-2012, 10:19 AM
CRD_Joe
Registered User
2005 KJ Liberty 
 
Join Date: Apr 2009
Location: Seattle
Posts: 151
The two best things you can do to increase mileage is to take as long as possible getting up to speed and driving SLOWER than the speed limit! Im not a big government kind of guy. With that said the national 55mph speed limit saved BILLIONS of gallons of fuel. If you want save fuel, drive 55mph.


2005 KJ CRD Sport
Suncoast, Transco, Inmotion, Provent, SEGR, CAT2, HID's, Samco hoses, louvers, V6 airbox, Fumoto, 2.5" cat back no muffler
CRD_Joe is offline  
Sponsored Links
Advertisement
 
post #17 of 37 Old 05-21-2012, 02:46 PM
MoD
Registered User
2005 KJ Liberty 
 
Join Date: Feb 2012
Location: elkhart
Posts: 241
Quote:
Originally Posted by cowboyjack View Post
I have been looking at getting better fuel mileage on my wives 05 liberty, I put the chevron technician fuel cleaner in maybe 10,000 miles ago and I stay on top of maintenance. I just did a oil change and yesterday and put regular oem champion plugs in and so far it only gets 17.2 mpg which it was getting before. Should I just get different plugs? she will be driving to work one hour one way all highway and I am trying to get every mpg out of the jeep that I can. Should i consider an aftermarket intake and if so which one? I hope it is just the plugs, would be a cheaper route. thanks for any input
i donno. i bought an amsoil replacement air filter. i didnt do some crazy cold air intake or anything just swapped filters and i put in platinum plugs even though everyone said to put in copper ones. i use my cruise control a lot and drive like i have some sense but i too drive an hour each day to work and still go through gas like its going out of style. the only other thing i can think of is keep the stock tire size
MoD is offline  
post #18 of 37 Old 05-21-2012, 02:49 PM
tommudd
Registered User
2004 KJ Liberty 
 
Join Date: Aug 2008
Location: Central OH/ Kilimanjaro,Tanzania
Posts: 5,624
Quote:
Originally Posted by cowboyjack View Post
I have been looking at getting better fuel mileage on my wives 05 liberty, I put the chevron technician fuel cleaner in maybe 10,000 miles ago and I stay on top of maintenance. I just did a oil change and yesterday and put regular oem champion plugs in and so far it only gets 17.2 mpg which it was getting before. Should I just get different plugs? she will be driving to work one hour one way all highway and I am trying to get every mpg out of the jeep that I can. Should i consider an aftermarket intake and if so which one? I hope it is just the plugs, would be a cheaper route. thanks for any input
Aftermarket intakes will do nothing to improve gas mileage

04 KJ 4.5 JBA lift, 03 KJ 2.5 JBA coilovers,
tommudd is offline  
post #19 of 37 Old 05-21-2012, 02:53 PM
tommudd
Registered User
2004 KJ Liberty 
 
Join Date: Aug 2008
Location: Central OH/ Kilimanjaro,Tanzania
Posts: 5,624
Quote:
Originally Posted by CRD_Joe View Post
The two best things you can do to increase mileage is to take as long as possible getting up to speed and driving SLOWER than the speed limit! Im not a big government kind of guy. With that said the national 55mph speed limit saved BILLIONS of gallons of fuel. If you want save fuel, drive 55mph.
I get better mileage at 70 than I do poking along at 55 and lugging the engine and causing traffic back ups
I also get on the highway and get up to cruising speed as soon as I can, saves fuel that way
If I have to drive 50-55, take forever to get up to speed, pull in my mirrors , remove the antenna, and put a sail on the back I'd be walking.

04 KJ 4.5 JBA lift, 03 KJ 2.5 JBA coilovers,
tommudd is offline  
post #20 of 37 Old 05-21-2012, 03:15 PM
CRD_Joe
Registered User
2005 KJ Liberty 
 
Join Date: Apr 2009
Location: Seattle
Posts: 151
Physics are physics TM. You do not get better mileage at 70 than you would at 55. You're just impatient!

2005 KJ CRD Sport
Suncoast, Transco, Inmotion, Provent, SEGR, CAT2, HID's, Samco hoses, louvers, V6 airbox, Fumoto, 2.5" cat back no muffler
CRD_Joe is offline  
post #21 of 37 Old 05-21-2012, 04:55 PM
tommudd
Registered User
2004 KJ Liberty 
 
Join Date: Aug 2008
Location: Central OH/ Kilimanjaro,Tanzania
Posts: 5,624
I agree to a point
But all engines also have a sweet spot in which they run and perform better. For example it maybe at 2000 RPMs, below that the engine will lug all the time, above it will of course burn more fuel.
Mine with the gearing I have and the tire size happens to do best at 70-72

04 KJ 4.5 JBA lift, 03 KJ 2.5 JBA coilovers,
tommudd is offline  
post #22 of 37 Old 05-21-2012, 05:05 PM
CRD_Joe
Registered User
2005 KJ Liberty 
 
Join Date: Apr 2009
Location: Seattle
Posts: 151
Youre talking about propelling a brick through the atmosphere. The faster you go the more resistance youre going to face. I agree with you somewhat. Depending on your gearing tires etc. But generally speaking the slower you go the better your mileage is going to be. My CRD really like 1650rpm at 58mph.

2005 KJ CRD Sport
Suncoast, Transco, Inmotion, Provent, SEGR, CAT2, HID's, Samco hoses, louvers, V6 airbox, Fumoto, 2.5" cat back no muffler
CRD_Joe is offline  
post #23 of 37 Old 05-21-2012, 05:10 PM
tommudd
Registered User
2004 KJ Liberty 
 
Join Date: Aug 2008
Location: Central OH/ Kilimanjaro,Tanzania
Posts: 5,624
Of course the CRD is going to like that lower RPM thats the way it is designed.
If I cruise at 55-58 it lugs, and if I switch off the overdrive at that speed ( 55-58) I get 2-3 mpgs more, almost the same as I do at 70 with it on.
Driven enough Cats and Cummins to know the difference in how a diesel likes to run -vs- a gasser

04 KJ 4.5 JBA lift, 03 KJ 2.5 JBA coilovers,
tommudd is offline  
post #24 of 37 Old 03-27-2014, 05:59 AM
cowboyjack
Registered User
 
Join Date: Feb 2012
Location: Chillicothe
Posts: 90
Does anyone have the part number for the copper ngks? I tried to get some and the guy couldn't find them
cowboyjack is offline  
post #25 of 37 Old 03-27-2014, 06:28 AM
tommudd
Registered User
2004 KJ Liberty 
 
Join Date: Aug 2008
Location: Central OH/ Kilimanjaro,Tanzania
Posts: 5,624
Champion coppers work as well , been running them since mine was first changed at 28,000 miles, now at 196,000 and swapped every 25-30,000.

04 KJ 4.5 JBA lift, 03 KJ 2.5 JBA coilovers,
tommudd is offline  
post #26 of 37 Old 03-27-2014, 08:21 AM
Gyrocaptain
Registered User
2007 KJ Liberty 
 
Join Date: Apr 2012
Posts: 78
ngk- ZFR6F.
It is on a sticker on the rad support.

Gyro
Gyrocaptain is offline  
post #27 of 37 Old 03-27-2014, 09:10 AM
cowboyjack
Registered User
 
Join Date: Feb 2012
Location: Chillicothe
Posts: 90
Thank you very much
cowboyjack is offline  
post #28 of 37 Old 03-27-2014, 07:19 PM
cowboyjack
Registered User
 
Join Date: Feb 2012
Location: Chillicothe
Posts: 90
So I tried to get those plugs....the parts store had no idea what I was talking about even with the part number. So I ended up ordering the nickel ones. I hope ' they work just as well
cowboyjack is offline  
post #29 of 37 Old 03-27-2014, 07:22 PM
tommudd
Registered User
2004 KJ Liberty 
 
Join Date: Aug 2008
Location: Central OH/ Kilimanjaro,Tanzania
Posts: 5,624
try another parts store not a *utozone etc, a real parts store and get some copper core Champions if not the NGKs
nickle??

04 KJ 4.5 JBA lift, 03 KJ 2.5 JBA coilovers,
tommudd is offline  
post #30 of 37 Old 03-27-2014, 08:57 PM
Gageraid
Registered User
2008 KK Liberty 
 
Join Date: May 2012
Location: Branchburg
Posts: 1,525
Quote:
Originally Posted by tommudd View Post
try another parts store not a *utozone etc, a real parts store and get some copper core Champions if not the NGKs
nickle??
This is what is in mine. Around Christmas I got these from the dealer when I asked for the 2008 spark plugs. Correct part number for the copper, and I think they said Nickel on them, too. I think it said it on the box if you can blow this picture up.


OME lift
Hypertech Max Energy
CAI, Gibson exhaust, 4.7L throttle body
Gageraid 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









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.




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
holy cow, popped the hood and found this 04liberty4x4 KJ Liberty Forum 18 12-22-2011 05:00 AM
Holy smoke! The Liberty ROLLS! NaeKid KJ Liberty Forum 11 12-06-2001 03:09 PM

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