WJ Fuel Economy - 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 > Models > Jeep Grand Cherokee & Commander Forums > WJ Grand Cherokee Forum > WJ Fuel Economy

Looking to re-gear?! CRAZY DEALS ON YUKON GEARS right here2014 Spartan Locker Special - While Supplies Last! Dana 3OPTIC ARMOR WINDOWS all sale now !!!!!!!!

Reply
Unread 08-20-2012, 12:35 PM   #1
GrowlerWJ
Registered User
1999 WJ 
 
Join Date: Jul 2012
Posts: 4
WJ Fuel Economy

Hey readers, I recently bought a 99' 4.0 WJ that was horribly maintained by the previous owner he mentioned ''I runn all my cars into the ground'' I know, what did I get myself into.. Anyway, I get like 15-17mpg city and I'm lucky if I get 20-21highway... My moms 00' WJ has nearly 300,000 on it and STILL gets better mileage than I do 18.8-19city 23-25mpg highway... How can I improve this? New sparkplugs, plug wires, fuel filter? Injectors? By the way, I'm a novice mechanic most I can do is change oil and headlights haha, I get all the work done by a family friend at MavisTire (he hooks me up) Am i being irrational about it all or is it fixable? Please, any suggestions or insight will help, thanks guys. -Rob

GrowlerWJ is offline   Reply With Quote
Unread 08-20-2012, 12:45 PM   #2
2001WJv8
Registered User
2001 WJ 
 
Join Date: Nov 2008
Location: Raleigh, NC
Posts: 510
you're getting a lot better than what these are rated to get, and your mom's is getting mileage in the "unbelievable" category unless she's using the hypermileage techniques

in short, no there isn't much you're going to do to get better than the above average mpg's you're already lucky to be getting - PO must've really babied it or snuck a 4 cylinder under the hood when n obody was looking
__________________
2001 WJ Laredo- 4x4 V8 QT-II (NV247); Destination AT 265-70/16, JK rims; Addcos F&R; Bilstein's; U/C Springs; Kolak 3" exhaust
2001WJv8 is offline   Reply With Quote
Unread 08-20-2012, 01:48 PM   #3
notfastenough5
Registered User
2001 WJ 
 
Join Date: Jun 2012
Location: The Colony, Texas
Posts: 31
Many answers you seek lie in the search box above. Hell, type your thread title in there and read on brotha.

Also, I agree with the above post, you have good mileage as it stands.
__________________
I don't have a ****ing asterisk button.
notfastenough5 is offline   Reply With Quote
Unread 08-20-2012, 02:00 PM   #4
WJlover
Senior Member
1999 WJ 
 
Join Date: Apr 2012
Location: portsmouth, nh
Posts: 657
im jealous of your mpg
WJlover is offline   Reply With Quote
Unread 08-20-2012, 02:32 PM   #5
jeepster250
Registered User
1999 WJ 
 
Join Date: Feb 2012
Location: charlotte, nc
Posts: 503
I get about 19 20 hw 15 city
jeepster250 is offline   Reply With Quote
Unread 08-20-2012, 02:37 PM   #6
dcocch
Registered User
1989 YJ Wrangler 
 
Join Date: Jan 2012
Location: Columbus, GA
Posts: 165
I get 21-23mpg if I drive 65mph. I'll get 23-25mpg if I drive 55mph.....but I get between 14-18mpg in city driving.

A lot of fuel economy is how you drive. Google some techniques. You can manipulate tire pressure, change spark plugs and O2 sensor, use thinner oil (not recommended), take extra weight out of the WJ, increase aerodynamics (reduce drag), etc. You're sitting pretty good at about 18-19 combined though.
dcocch is offline   Reply With Quote
Unread 08-20-2012, 03:21 PM   #7
Geo-Nemesis
Registered User
1999 WJ 
 
Join Date: Mar 2011
Location: Bologna, Italy
Posts: 395
"fuel" and "economy" are 2 words that don't stick togheter when talking about jeeps
__________________
1999 FLAT BLACK WJ 3.1 td QT II:
IRO 4" w/front LCA&UCA, rear LCA, D.T. 8000 shocks//JKS disconnects//Rancho RS5000 SS//Overland skid plates//HID 35W 5kK[low beam] HID 55W 5kK[high beam]//home made twin front D-ring shackle mount//1.25" wheel spacers//K&N drop-in air filter +more
Geo-Nemesis is offline   Reply With Quote
Unread 08-20-2012, 03:26 PM   #8
elcorvino
Registered User
2003 WJ 
 
Join Date: Jul 2011
Location: Fort Lauderdale, FL
Posts: 1,243
Ef You! I get 19.5 mpg all highway driving 55 mph to 65 mph and always on cruise control on flat land.
elcorvino is offline   Reply With Quote
Unread 08-20-2012, 09:04 PM   #9
cde02ltd
Registered User
 
Join Date: Jul 2012
Posts: 152
Geez! I would be happy with 15, I get 13.8...and it does not matter how I drive. 4.7 ho here, a jeep is not driven for gas mileage...atleast thats what my wife says when I complain about gas mileage. That's why the other vehicle is a MINI.
cde02ltd is offline   Reply With Quote
Unread 08-20-2012, 09:08 PM   #10
CrutchfieldMark
Registered User
2004 WJ 
 
Join Date: Apr 2012
Location: Charlottesville, va
Posts: 157
I have larger tires so my economy isn't as good as it could be. Yours don't sound all that bad. Is your mom's a 2X4?
__________________
What fits your Jeep?? Find out below!!

[URL="www.crutchfield.com/I-rJP1c111/vehicles/Jeep-Car-Stereos-and-Speakers.html"]Crutchfield Fit Guide for Jeeps[/URL]
CrutchfieldMark is offline   Reply With Quote
Unread 08-20-2012, 09:34 PM   #11
DustinWJ
Registered User
1999 WJ 
 
Join Date: Nov 2011
Location: Fairbanks, AK
Posts: 92
i get 19 in town and like 24 on the freeway with my pig of a stock 4.0 laredo
DustinWJ is offline   Reply With Quote
Unread 08-20-2012, 11:38 PM   #12
MoparMan1990
Registered User
2000 WJ 
 
Join Date: Jun 2011
Location: Chaska, Minnesota
Posts: 717
Quote:
Originally Posted by DustinWJ
i get 19 in town and like 24 on the freeway with my pig of a stock 4.0 laredo
Lucky!!! I went 300 miles on a full tank of gas fml
MoparMan1990 is offline   Reply With Quote
Unread 08-21-2012, 12:04 AM   #13
Larryftmfw
Registered User
2004 WJ 
 
Join Date: Dec 2011
Location: Warner robins, Ga
Posts: 774
Quote:
Originally Posted by MoparMan1990

Lucky!!! I went 300 miles on a full tank of gas fml
Lucky you I get 217 miles on a full tank

Sent from my iPhone using JeepForum because I can!
Larryftmfw is offline   Reply With Quote
Unread 08-21-2012, 12:39 AM   #14
MoparMan1990
Registered User
2000 WJ 
 
Join Date: Jun 2011
Location: Chaska, Minnesota
Posts: 717
Quote:
Originally Posted by Larryftmfw

Lucky you I get 217 miles on a full tank

Sent from my iPhone using JeepForum because I can!
I need a TPS so I'm thinking once I replace that it'll get better considering its idling at 1000 rpm
MoparMan1990 is offline   Reply With Quote
Unread 08-21-2012, 01:30 AM   #15
alfaitalia
CRD Pilot!
 
alfaitalia's Avatar
2004 WJ 
 
Join Date: Feb 2011
Location: Bognor, West Sussex. England. Great Britain
Posts: 2,474
Yawn!!
__________________
If at first you don't succeed, skydiving is not for you.
alfaitalia is online now   Reply With Quote




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.