MPG tips - Page 3 - 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 > Cheap Tricks & Fixes > MPG tips

Year End Clearance Sale! Save 20%Santa Kolak Announces: Kolak Exhaust 20% Off Sale!ROCK BOTTOM prices on LIFT KITS at Rockridge4wd!! WANT TO

Reply
Unread 02-07-2013, 07:15 AM   #31
Octotat
Registered User
1995 ZJ 
 
Join Date: Oct 2012
Location: Chattanooga, TN
Posts: 61
Bought my bone stock zj with 4.0L. Did a tune up and was able to get 21mpg on my commute (mostly highway, 90 mile round trip).

Added 2' lift, 31x 10.50 ATs, a 110 lb winch bumper, 80lb winch and I now get 16 mpg.

Of course I have a steel gas tank skid plate, and a new steel rear bumper which should an additional 150lbs, so I'm sure my mpg will drop just as fuel $ go up

Of course, I could try to get my VW Diesel Jetta back from my wife to get my 42mpg, but that would require buying her a new car which really isn't going to save me money in the long run

Octotat is offline   Reply With Quote Quick reply to this message
Unread 02-07-2013, 08:30 AM   #32
patriotmfd
Registered User
2002 WJ 
 
Join Date: Jan 2011
Location: Brick, New Jersey
Posts: 21
all good except the seafoam ??? how does it work will all that smoke clog my cats ??? someone educate me please .... i have a can in the garage but hesitant on using it because i don't believe in magaic
patriotmfd is offline   Reply With Quote Quick reply to this message
Unread 02-08-2013, 10:02 AM   #33
Octotat
Registered User
1995 ZJ 
 
Join Date: Oct 2012
Location: Chattanooga, TN
Posts: 61
All the Seafoam is is a solvent to help remove carbon and gunk buildup in the throttle body and intake. My rig ran noticeably smoother after doing the treatment. I didn't do a before/after mpg test though.
Octotat is offline   Reply With Quote Quick reply to this message
Unread 02-08-2013, 12:40 PM   #34
04Xrook
Registered User
 
Join Date: Jan 2013
Location: Milford, Mass
Posts: 49
I can't agree more. Driving under 60, preferably around 55, my TJ gets about 24mpg (4.0, 5spd, 24 if I'm alone, 23 if the wife and kids are with me). At 65 mph on the interstate my mpg drops to 20-21. Of course around town I get 19-20. These are just blocky vehicles. Slower speed helps a lot, both in wind resistance and rpm range. I was really surprised as to the difference and only noticed it when my company moved another 15 miles away, forcing me to take highways to work.



You get over 20 mpg? I'm lucky if I get 20 on a 55mph road w no stoplights an 10 miles of downhill. Around town 14-17. Stock 4.0 5spd
04Xrook is offline   Reply With Quote Quick reply to this message
Unread 02-08-2013, 12:44 PM   #35
04Xrook
Registered User
 
Join Date: Jan 2013
Location: Milford, Mass
Posts: 49
.
04Xrook is offline   Reply With Quote Quick reply to this message
Unread 02-10-2013, 06:55 PM   #36
PReinie
Registered User
1989 XJ Cherokee 
 
Join Date: Jan 2013
Location: Northbrook, IL
Posts: 18
Many of your suggestions are included here except he uses acetone: http://blip.tv/KipkayVideos/how-to-d...ileage-4414239
PReinie is offline   Reply With Quote Quick reply to this message
Unread 02-11-2013, 01:38 PM   #37
jesse12801
Registered User
 
Join Date: Jan 2013
Location: glens falls, NY
Posts: 62
Seafoam in the oil? Won't that cause an over fill?
jesse12801 is offline   Reply With Quote Quick reply to this message
Unread 02-11-2013, 01:48 PM   #38
XJNKY
Registered User
1998 XJ Cherokee 
 
Join Date: Mar 2010
Location: , Central KY
Posts: 477
Quote:
Originally Posted by jesse12801 View Post
Seafoam in the oil? Won't that cause an over fill?
Not if you leave room for it... You don't put much in in the first place. Chances are, unless you continuously top off your oil, you're going to have a little bit of room in the "safe" zone on the dipstick anyway. If it's the first time you're doing it, I recommend doing it 50-100 miles before your next oil change. I've seen it break some pretty disgusting particles loose in the oil before, and you don't want that stuff circulating too much.
XJNKY is offline   Reply With Quote Quick reply to this message
Unread 02-11-2013, 02:00 PM   #39
XJNKY
Registered User
1998 XJ Cherokee 
 
Join Date: Mar 2010
Location: , Central KY
Posts: 477
Quote:
Originally Posted by markcap View Post
Sorry, this thread cracks me up...you are driving a straight 6 292ci Jeep. Fuel economy is horrible no matter how you drive. I can't beat 15mpg with typical grocery getting type driving. Think I saw 19mpg on a long trip. A straight six is not a fuel efficient motor. It ought to have been designed a diesel.
Where did you manage for find a 292ci Jeep engine? Did you perhaps rob it out of an old Chevy?

Also, the idea that a straight 6 cannot be fuel efficient cracks me up. The Jeep straight 6's are torque-strong (you know, the same way diesels get good gas mileage if that's what they're set up for, read: TDI's).

Point being, Jeeps get bad gas mileage because of aerodynamics, and gearing, not because a straight 6 is inherently inefficient. If Chrysler had invested the money into properly updating the 4.0 in 2000 instead of just crapping up the design with bad pistons and weak heads, maybe given it a slightly longer stroke, 4v/cylinder, and an overhead cam, they probably would have moved to the upper 20's (or better) with MPG's. Look at Nissan and Toyota, and their straight 6's. They're not fuel sippers, but if you look at the power they're putting out, it's not a bad ratio.

Although you're right... they should just be giving us diesels.
XJNKY is offline   Reply With Quote Quick reply to this message
Unread 02-12-2013, 11:59 AM   #40
DirtRider1357
Registered User
2005 LJ Wrangler 
 
Join Date: May 2011
Location: Morrisville, PA
Posts: 441
Im not sure if this is true for the 4.0s but a lot of newer motors shut off the fuel when coasting down hill. so the same priniciple could be applied when downshifting to brake.
__________________
87 YJ, 4.0L, 5speed......sold, 05 LJ Rubicon
"It'll buff out"
"If it moves and shouldn't, use Duct Tape & Zip Ties. If it doesn't move and should, use WD-40 & A hammer"
DirtRider1357 is offline   Reply With Quote Quick reply to this message
Unread 02-14-2013, 05:17 PM   #41
ToothlessJoe
Registered User
2001 TJ Wrangler 
 
Join Date: Sep 2011
Location: Fort Collins, Colorado
Posts: 36
Quote:
Originally Posted by mKosel View Post
drive like a grandma, thats what i do!
+1
ToothlessJoe is offline   Reply With Quote Quick reply to this message
Unread 05-22-2013, 09:45 PM   #42
woodyoakes
Registered User
 
Join Date: May 2013
Location: Wichita, Kansas
Posts: 30
So lift kits and 35s are bad?
woodyoakes is offline   Reply With Quote Quick reply to this message
Unread 05-22-2013, 10:02 PM   #43
petegall79
Registered User
2006 TJ Wrangler 
 
Join Date: Aug 2009
Location: Southern NH
Posts: 64
Quote:
Originally Posted by woodyoakes View Post
So lift kits and 35s are bad?
On a Honda, yeah, they're pretty bad.

Oh wait, you're talking about on a jeep? really?
petegall79 is offline   Reply With Quote Quick reply to this message
Unread 05-23-2013, 05:57 AM   #44
markcap
Registered User
2000 XJ Cherokee 
 
Join Date: Mar 2004
Location: Lehighton, PA, PA
Posts: 28
Quote:
Originally Posted by XJNKY View Post

Where did you manage for find a 292ci Jeep engine? Did you perhaps rob it out of an old Chevy?

Also, the idea that a straight 6 cannot be fuel efficient cracks me up. The Jeep straight 6's are torque-strong (you know, the same way diesels get good gas mileage if that's what they're set up for, read: TDI's).

Point being, Jeeps get bad gas mileage because of aerodynamics, and gearing, not because a straight 6 is inherently inefficient. If Chrysler had invested the money into properly updating the 4.0 in 2000 instead of just crapping up the design with bad pistons and weak heads, maybe given it a slightly longer stroke, 4v/cylinder, and an overhead cam, they probably would have moved to the upper 20's (or better) with MPG's. Look at Nissan and Toyota, and their straight 6's. They're not fuel sippers, but if you look at the power they're putting out, it's not a bad ratio.

Although you're right... they should just be giving us diesels.
I should of wrote 242 ci. No I didn rob an old chevy. But good one though!

It is hard to believe all of the statements from drivers seeing better than 20 mpg. Mine is all stock with the factory tow package. I see 15 mpg for everyday short trip type driving.
markcap is offline   Reply With Quote Quick reply to this message
Unread 05-24-2013, 09:30 AM   #45
jesse12801
Registered User
 
Join Date: Jan 2013
Location: glens falls, NY
Posts: 62
Can a 2007 GC AWD laredo run on 93 octane or is it only geared for 87??Where does the seafoam go?In the tank?
jesse12801 is offline   Reply With Quote Quick reply to this message
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.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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






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.