Fuel Economy Disappointment 08 GC V6 - 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 > WK Grand Cherokee & XK Commander Forum > Fuel Economy Disappointment 08 GC V6

Introducing MONSTALINERô UV Permanent DIY Roll On Bed LineYear End Clearance Sale! Save 20%NEW!! HMF 50"-52" light bar mounting brackets!!

Reply
Unread 03-17-2008, 07:18 PM   #1
Cashburn
Registered User
2008 WK 
 
Join Date: Oct 2004
Posts: 18
Fuel Economy Disappointment 08 GC V6

Have just made my 4th or 5th payment on my 2008 Grand Cherokee. It is a V6 model with the Rocky Mountain package so it sits a little higher I believe and has the extra roof rails so I would expect a little lower fuel economy, though it should be virtually undetectable on the averaging meter.

I just went over 5,000 miles and did the second oil change.

Anyway, at highway speeds of 65-68 mph I am only seeing 14.7 mpg (on a sustained 45 minute drive with even roads, for every ascent there is a comparable descent). Actually if I increase my speed via the cruise control to 73 - 75 mph then the same route I see slightly better economy of 15.3 mph.

In either case that is very disappointing compared to the numbers the factory/EPA projects for highway driving. The best economy I have ever seen on the highway was 18.3 mpg at about 70 mph even.

Cashburn is offline   Reply With Quote Quick reply to this message
Unread 03-17-2008, 07:19 PM   #2
Crookster777
Registered User
2010 WK 
 
Join Date: Aug 2006
Location: Downtown Manhattan
Posts: 458
Its a Jeep, what do you expect? Its a brick with wheels.
__________________
-Joe- 2010 Jeep Grand Cherokee SRT8- Yeah it's got a Hemi!

HEMI Club Member #1
If you have a Hemi please join: http://jeepforum.com/forum/showthread.php?t=506901
NightCrew #127
Crookster777 is offline   Reply With Quote Quick reply to this message
Unread 03-17-2008, 08:38 PM   #3
HurriJeff
Registered User
2013 WK 
 
Join Date: Mar 2007
Location: Florida
Posts: 485
Unbelievable !!! I get that or better with my Hemi !!! I get between 16mpg and 17mpg at 75mph over an hours average. Sorry to hear about that .
__________________
05 Grand Cherokee Limited 5.7 Hemi 265/65/17 Revos, K&N
HEMI CLUB MEMBER #10
Previous Jeeps:
1998 ZJ Special Edition 2wd- Traded
1991 XJ 2.8 2wd Sold
HurriJeff is offline   Reply With Quote Quick reply to this message
Unread 03-17-2008, 09:16 PM   #4
Crookster777
Registered User
2010 WK 
 
Join Date: Aug 2006
Location: Downtown Manhattan
Posts: 458
10k is usually when you will really break everything in and the mileage would be constant.
__________________
-Joe- 2010 Jeep Grand Cherokee SRT8- Yeah it's got a Hemi!

HEMI Club Member #1
If you have a Hemi please join: http://jeepforum.com/forum/showthread.php?t=506901
NightCrew #127
Crookster777 is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 08:52 AM   #5
rhythmace
Registered User
 
Join Date: Oct 2007
Location: Philly
Posts: 38
I'm a bit over 20K and see the same mpg, no higher than 15.0. I'm also very conscious of my driving style. Disappointing is right.
rhythmace is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 10:15 AM   #6
Kerndone
I lack money
 
Kerndone's Avatar
1999 TJ Wrangler 
 
Join Date: Nov 2003
Location: Naperville, IL
Posts: 768
I know its a Jeep, but I went the "economical" way and got the V6 in mine as well. I was expecting 14-15 in the city and 18-20 on the highway. Pretty reasonable considering thats even under what the sticker projected and thats what my 4.0 WJ would get. I get about 11.5-13 in the city and 16-18 on the highway. Which is why in another thread I said that I should have just got the 4.7 with the dismal mpg I'm seeing.
__________________
Red Jeep Club Member 111

'99 TJ - work in progress...see profile

'08 WK - Silver RME, DD.
Kerndone is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 02:29 PM   #7
Cashburn
Registered User
2008 WK 
 
Join Date: Oct 2004
Posts: 18
I hope others will share what they are seeing. This is not even close to what they project on the sticker.
Cashburn is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 04:27 PM   #8
Crookster777
Registered User
2010 WK 
 
Join Date: Aug 2006
Location: Downtown Manhattan
Posts: 458
Quote:
Originally Posted by Cashburn View Post
I hope others will share what they are seeing. This is not even close to what they project on the sticker.
Sticker on my 07 Overland: 14 city 19 highway

What I get: 8 city 15 Highway
__________________
-Joe- 2010 Jeep Grand Cherokee SRT8- Yeah it's got a Hemi!

HEMI Club Member #1
If you have a Hemi please join: http://jeepforum.com/forum/showthread.php?t=506901
NightCrew #127
Crookster777 is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 08:04 PM   #9
AferVentus
Registered User
2006 LJ Wrangler 
 
Join Date: Aug 2007
Location: Minnesota
Posts: 66
Wow, that's horrible. We had a rental 3.7 Laredo one time when ours was in the shop and we were getting 18-19 with city/highway driving.

The funny thing is: Our CRD's sticker says 17 city 22-highway and we get 25 highway and 20 city!
AferVentus is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 08:36 PM   #10
----
Registered User
 
Join Date: Feb 2008
Location: *
Posts: 682
<-- 20/30 with a broken EGR. Normally, 20/24.
---- is offline   Reply With Quote Quick reply to this message
Unread 03-18-2008, 09:41 PM   #11
super60dodge
Registered User
2005 WK 
 
Join Date: Mar 2006
Location: Ohio
Posts: 24
my wife and I have an 05 w/ the 4.7 and I can get 19-20 on the highway while my wife sits at no better than 16. When she is in town I call her Mario because of the way she drives LOL.

Do you reset the meter or just see how it averages w/ all your in town driving?

Joe
super60dodge is offline   Reply With Quote Quick reply to this message
Unread 03-19-2008, 02:07 AM   #12
array
Registered User
 
Join Date: Dec 2006
Location: ZV, Slovakia, Mid. EU
Posts: 215
Quote:
Originally Posted by AferVentus View Post
Wow, that's horrible. We had a rental 3.7 Laredo one time when ours was in the shop and we were getting 18-19 with city/highway driving.

The funny thing is: Our CRD's sticker says 17 city 22-highway and we get 25 highway and 20 city!
yes, mostly its possible to make round 20 mpg in the city. i do from 18 - 20 in the city. it depends on driving habbits. and range for hwy is 23 - 28 mpg.
22 - 23 i get when cruising at 100mph. and when i drive furious from 100 mph full trottle to max speed, little braking and again, (car chase with other cars) i get just 20 mpg highway miles.
__________________
2006 WH Limited 3,0 CRD
LeBra front end cover, 275/45-20
--------------------------
www.cardomain.com/id/array
array is offline   Reply With Quote Quick reply to this message
Unread 03-19-2008, 08:33 AM   #13
Cashburn
Registered User
2008 WK 
 
Join Date: Oct 2004
Posts: 18
Quote:
Originally Posted by super60dodge View Post

Do you reset the meter or just see how it averages w/ all your in town driving?

Joe
I reset it on different drives to get a feel for the variations. If I had more time I would try a few trips at 55mph, but I might get rundown.
Cashburn is offline   Reply With Quote Quick reply to this message
Unread 03-19-2008, 08:56 AM   #14
Pointblank
Registered User
 
Join Date: Oct 2006
Location: Minnesota
Posts: 55
That is some pretty poor fuel mileage for a V6. My wife has an 06 WK and we normally see 20+ MPG on the highway and 15-16 in town. We took a 100 mile trip last weekend and averaged 21 MPG with it.

Have you hand calculated the mileage to see if the display is accurate? Either way, I'd go back to the dealer and see if theres anything they can do. You should be getting better than 15 highway.
__________________
04 TJ Rubicon, [COLOR="Yellow"]Solar Yellow[/COLOR], 5 speed, 4" suspension lift, 285's(33's), Warn rock crawler front bumper with grille guard, Ramsey 8000 pound winch, JKS UCA's, CV driveshaft
Pointblank is offline   Reply With Quote Quick reply to this message
Unread 03-19-2008, 03:02 PM   #15
jjandersonn
Registered User
2008 WK 
 
Join Date: Jan 2005
Location: Calgary, AB
Posts: 94
We get better than sticker with our '08 Overland CRD too!

We get 11.5L/100km vs. the sticker shows 12L/100km (a lower L/100km is better) - all City. As a bonus, diesel here (Calgary, AB) is barely more than regular gas ($0.01 - $0.10 more than reg gas). I find that driving style doesn't impact the CRD's mileage as much as it does in gas vehicles...not sure why, lower rpms maybe? For the size/wieght/class of vehicle, the CRD WK mileage is unbeatable in the domestic car market. I praise diesel to anyone who listens!

I've heard the new VW Jetta 2.0L Diesel (same common rail technology as the WK) will get 5L/100km; I know what my next commuter car will be... Forget hybrid, hello diesel!
__________________
-Jordan
2008 Grand Cherokee - Overland
2006 Liberty - Renegade (SOLD)
1997 Grand Cherokee - Laredo (SOLD)
Calgary, AB, Canada
jjandersonn 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


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.