Recent Topics
EFB and AGM batteries charge faster?
by slybunda. 12/14/18 11:20 AM
97.5 Regal GS climate control illumination
by 71Chevyguy. 12/14/18 11:04 AM
Cool train site for Canadians
by Papa Bear. 12/14/18 10:09 AM
Putting together a groups 3/4/5 synthetic list
by MrWideTires. 12/14/18 10:02 AM
VW Atlas V6 Oil
by motech. 12/14/18 09:32 AM
Great shakes, it's Yahtzee... or a Taurus
by redhat. 12/14/18 09:03 AM
MWI Micro Wave Ignition
by Danno. 12/14/18 08:52 AM
8k Miles on M1 EP 2017 Subaru 3.6
by BISCUT. 12/14/18 08:47 AM
Wrong ATF Fluid in my 07 Chevy Impala
by CM613. 12/14/18 08:39 AM
Hyundai motor oil
by pbm. 12/14/18 08:16 AM
Which Exhaust Manifold Should I Buy
by Miller88. 12/14/18 08:10 AM
Rotella T5 10w30 Ford 6.7L anyone?
by sw99. 12/14/18 07:49 AM
Advice on spark plugs for 90,000 mile Accord
by Chris B.. 12/13/18 11:24 PM
Elec star kit for predator engine...
by SmokeyBear. 12/13/18 11:07 PM
Mecredes Bosch vs Ngk sparks plug
by Rohan. 12/13/18 09:48 PM
Wife problem?
by penguin. 12/13/18 08:04 PM
2008 Chevy Malibu 3.6L V6
by lordcheeto. 12/13/18 07:36 PM
power company merged and I got the shaft
by motor_oil_madman. 12/13/18 07:19 PM
Space heater burnt smell
by BossMoss. 12/13/18 07:13 PM
Newest Members
captobvious, pgrkcs, 4Doors4Life, 780Ari, kayumb
66677 Registered Users
Who's Online Now
92 registered members (53' Stude, 2K2AcuraTL, 92saturnsl2, 71Chevyguy, 69GTX, 12 invisible), 1,945 guests, and 38 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics295,058
Posts4,926,997
Members66,677
Most Online2,553
Oct 27th, 2018
Donate to BITOG
Previous Thread
Next Thread
Print Thread
Hop To
Chrysler changing oil spec Grand Cherokee 4.7 H.O. #4705759
03/24/18 07:10 PM
03/24/18 07:10 PM
Joined: Jan 2007
Posts: 20
USA NY
Turbo Offline OP
Turbo  Offline OP
Joined: Jan 2007
Posts: 20
USA NY
Need to change the oil in a 2004 Grand Cherokee with the 4.7 High Output Engine. Found some very interesting information and was wondering why would Chrysler change oil specs after a vehicle has been in service for six years? The factory service manual says 5w-30 is preferred up to 100F and it is even labeled on the oil fill cap. In 2008 six years after this motor was first introduced they release a Technical Service Bulletin changing the oil spec to 5w-30 for below 32F and 10w-30 for above 0f. Why would they do this? Don't you think it is a little late in the game for such a change? Does anyone here know why this was done. The bulletin is basically saying we made a mistake. Why not run the 5w-30 in the warmer weather especially if it is synthetic.

Here is the factory owners manual. Page 260 has the oil recommendations.
https://cdn.dealereprocess.net/cdn/servicemanuals/jeep/2004-grandcherokee.pdf



BULLETIN NUMBER: 04172008
TO: All Lubrication Guides Users
FROM: Specifications Team, Chek-Chart Data Acquisition
DATE: April 17, 2008

SUBJECT: Engine oil viscosity listed for 2001-08 Jeep Grand Cherokee and 2007-08 Jeep Commander

Please be advised that the engine oil viscosity as published in our Lubrication Guides is incorrectly listed in some occasions for the 2001-08 Jeep Grand Cherokee and 2007-08 Jeep Commander. The OEM recommended engine oil viscosity for the 2001-08 Jeep Grand Cherokee and 2007-08 Jeep Commander is listed below:

2007-08 3.0L Turbo Diesel All Temperatures - SAE 5W-30

2005-06 3.7L All Temperatures - SAE 5W-30

2007-08 3.7L All Temperatures - SAE 5W-20

2001-04 4.0L Above 0 degrees Fahrenheit - SAE 10W-30
Below 32 degrees Fahrenheit - SAE 5W-30

2001-04 4.7L Above 0 degrees Fahrenheit - SAE 10W-30
Below 100 degrees Fahrenheit - SAE 5W-30

2005-06 4.7L All Temperatures - SAE 5W-30

2007-08 4.7L All Temperatures - SAE 5W-20

2002-04 4.7L High Output Above 0 degrees Fahrenheit - SAE 10W-30
Below 32 degrees Fahrenheit - SAE 5W-30

2005-08 5.7L All Temperatures - SAE 5W-20

2006-08 6.1L All Temperatures - SAE 0W-40

Last edited by Turbo; 03/24/18 07:15 PM.
Re: Chrysler changing oil spec Grand Cherokee 4.7 H.O. [Re: Turbo] #4705798
03/24/18 07:33 PM
03/24/18 07:33 PM
Joined: Dec 2017
Posts: 3,007
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 3,007
SE British Columbia, Canada
Very anomalous change for the 2002-04 4.7 H.O. Was it experiencing lifter noise?

The 6.1 using 0w-40 I understand. Its a dedicated high performance motor and most likely will be driven hard.

Small typo for the 4.7. Should probably read below 32, not below 100.

Last edited by Snagglefoot; 03/24/18 07:38 PM.

If you want the job done right......do it yourself.
Re: Chrysler changing oil spec Grand Cherokee 4.7 H.O. [Re: Turbo] #4705834
03/24/18 08:03 PM
03/24/18 08:03 PM
Joined: Nov 2011
Posts: 4,015
Lima, Ohio, USA
earlyre Offline
earlyre  Offline
Joined: Nov 2011
Posts: 4,015
Lima, Ohio, USA
if you want to muddy the waters further, My brother's '07 Dakota has the 4.7 HO, it's manual calls for a blanket 5w20 across all temps and engine configurations.


Mine:
09 Mercury Sable : 6qts AutoQuest(Meijer/Warren) 0w20, WIX 51516
Mine to Maintain:
03 Pontiac Vibe : 4.5qts VWB 5w30,WIX 51394
Re: Chrysler changing oil spec Grand Cherokee 4.7 H.O. [Re: Turbo] #4706108
03/25/18 07:29 AM
03/25/18 07:29 AM
Joined: Jan 2013
Posts: 1,415
America's Dairyland
LotI Offline
LotI  Offline
Joined: Jan 2013
Posts: 1,415
America's Dairyland
Ford has done this too with the 6.8l V10 gasser. Up to 2015, they spec'd 5w-20 like all the other modular motors but then made a change to 5w-30.

There were no changes to the engine with the switch to 30 grade oil and it's not retroactive. Since it's a HD vehicle they don't have to go through emission testing again.

I run a A3/B4 in mine.


03 Honda Interceptor
11 Kawasaki KLR 650
12 Ford E450
17 VW GTI
[IMG]http://badges.fuelly.com/images/sig-us/803455.png[/IMG]
Re: Chrysler changing oil spec Grand Cherokee 4.7 H.O. [Re: Turbo] #4706260
03/25/18 09:55 AM
03/25/18 09:55 AM
Joined: Dec 2017
Posts: 1,318
US
JLTD Offline
JLTD  Offline
Joined: Dec 2017
Posts: 1,318
US
The TSB said error in printing which is certainly possible. Maybe also the long timing chains were shearing thee oil too rapidly?


I'm a thickie; assimilate
But 20s have their place

Using AMSOIL

Hers: 2008 Jeep Liberty 138k, SS 5w30/Amsoil

His: 2015 4Runner 41k, OE 5w30/Wix

Re: Chrysler changing oil spec Grand Cherokee 4.7 H.O. [Re: Turbo] #4707239
03/26/18 07:25 AM
03/26/18 07:25 AM
Joined: Jun 2011
Posts: 7,155
Mahzurrah!
KCJeep Online content
KCJeep  Online Content
Joined: Jun 2011
Posts: 7,155
Mahzurrah!
They are trying to avoid too thin of oil due to shear. The 5w30's of the era were not as good as now, and even today you could reasonably expect less shear with a 10w30 over a 5w30.

The old 4.0 which I still own does not do well on thinner oils, and had the 10w30 recommendation right from the start.

I have run everything from 5w30 to SAE 30 and HDEO 10w30's in mine depending on temperature. I can assure you at temps above 20 degrees or so you will not likely notice the slightest running difference between a 10w30 and a 5w30.

In my Jeep, as long as it's above 45 or so, the SAE 30 starts and runs just like a 10w30.


2018 VW Passat GT VR6 - 1k - New FF
12 KIA Sedona 93k - PP HM 10w30
09 Ford Focus 132k - Supertech FS HM 5w30
00 Chev Lumina 203k - Supertech FS HM 5w30
04 Jeep Grand Cherokee gone but not forgotten.
Re: Chrysler changing oil spec Grand Cherokee 4.7 H.O. [Re: Turbo] #4708690
03/27/18 04:24 PM
03/27/18 04:24 PM
Joined: Dec 2009
Posts: 26,231
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline
Joined: Dec 2009
Posts: 26,231
Regina, Saskatchewan, Canada
Chrysler likes to complicate oil choices, I think. wink


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515

BOB IS THE OIL GUY® Powered by UBB.threads™