Is running 85w140 dino gear oil ok in the diffs? - 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 Liberty Forums > KJ Liberty Forum > Is running 85w140 dino gear oil ok in the diffs?

FS: 2007-2013 Jeep Wrangler "HALO" Angel Eye KitFlowmaster's Force II Axle-back exhaust system for the 201FS: Wranger BRIGHT License Plate LED! Just $3! Great value

Reply
Unread 11-18-2013, 04:10 PM   #1
Jeepguy4276
Registered User
 
Join Date: Apr 2013
Location: Fargo, North dakota
Posts: 293
Is running 85w140 dino gear oil ok in the diffs?

The jeep doesn't see a lot of heavy duty use. Researching things I decided to go Dino and a few mentioned this weight. It does get cold here. I had trouble finding many choices so it was 80w90, 70w90, and the 85w140. I went with the 85w140 because it came in a gallon and quarts. Since I'm doing both I thought the gallon discount was worth it. I know the heavy weight will give me a minute decrease in mpg but the better protection seems worth it. I would thinks the oil will warm quickly as well even when cold. I also thought the thicker oil would stick to the gears longer when not moving.

So am I doing good running this weight? Again, I've decided on Dino so please no Dino vs synthetic. Just asking on the weights.


Also, I do change fluid often, more often than is needed. It's cheap and easy so I change it, and other fluids usually once a year unless I run through deep water. Same with air filter and plugs. I've got the time and it gives me something to do.

Jeepguy4276 is offline   Reply With Quote
Unread 11-18-2013, 05:35 PM   #2
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 7,948
I run 85w-140 in both my diffs,I'm required to in my rear diff as both are not stock.The best protection for your diffs,syn gear oil is bad.
__________________
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
tjkj2002 is offline   Reply With Quote
Unread 11-18-2013, 05:46 PM   #3
95BadBoy
Moderator
2005 TJ Wrangler 
 
Join Date: May 2006
Location: Grand Forks, ND
Posts: 2,834
With the regular fluid changes that you already do, with either 80/90 or 85/140 should not be an issue. And yes - dino is really the best bet.


As cold as it gets here sometimes, I wish that I had 80/90 in all rigs during the winter.
__________________
05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded

FS or FT (2) JK Rubi 17" Moab Rims - really nice shape
Need JK Rear Spare tire bracket for project
95BadBoy is offline   Reply With Quote
Unread 11-18-2013, 08:13 PM   #4
tommudd
Registered User
2004 KJ Liberty 
 
Join Date: Aug 2008
Location: Central OH/ Moshi Tanzania, Ohio/Tanzania
Posts: 4,105
Been running 85-140 dino in mine for years , no issues at all
__________________
04 Liberty, Kilimanjaro Edition, Rock Lizard RockRails/Roof Rack/Front-Rear bumper,32 inch Goodyear Duratracs,Moabs,4.10s/ 4.25 inch JBA Coilover lift /other goodies
tommudd is online now   Reply With Quote
Unread 11-19-2013, 07:21 AM   #5
DaveJKJ
Registered User
2005 KJ Liberty 
 
Join Date: Nov 2008
Location: stuck in the mud again
Posts: 1,080
85-140 dino here in both diffs. No problems.
__________________
War Veterans Jeep Group #31
Black Jeep Society #217
DaveJKJ is offline   Reply With Quote
Unread 11-19-2013, 07:25 AM   #6
2007LIB
Registered User
2007 KJ Liberty 
 
Join Date: Sep 2013
Location: Ajax, Ontario
Posts: 57
Quote:
Originally Posted by tommudd View Post
Been running 85-140 dino in mine for years , no issues at all
My owners manual says I should use synthetic in the rear dif. of my 2007. Is there a difference for that year? I have used synthetic with other vehicles with no issues.
__________________
If it ain't broke don't fix it.....Enjoy it.
2007LIB is offline   Reply With Quote
Unread 11-19-2013, 08:06 AM   #7
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 7,948
Quote:
Originally Posted by 2007LIB View Post
My owners manual says I should use synthetic in the rear dif. of my 2007. Is there a difference for that year? I have used synthetic with other vehicles with no issues.
Only states that for the extra .10mpg it gives.
__________________
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
tjkj2002 is offline   Reply With Quote
Unread 11-19-2013, 10:39 AM   #8
Jeepguy4276
Registered User
 
Join Date: Apr 2013
Location: Fargo, North dakota
Posts: 293
Quote:
Originally Posted by 95BadBoy View Post
With the regular fluid changes that you already do, with either 80/90 or 85/140 should not be an issue. And yes - dino is really the best bet.


As cold as it gets here sometimes, I wish that I had 80/90 in all rigs during the winter.


What difference do you notice? I can't imagine the minute change in mpg's would be noticeable and I would think it warms up fast even with our cold temps. I guess I don't know what difference I might notice. You know the temps we deal with. I was thinking the thicker may help since the axels take a bit of pounding here. They tires spin on ice then catch hard as the hit dry pavement.

So what differences should I be noticing?
Jeepguy4276 is offline   Reply With Quote
Unread 11-19-2013, 10:52 AM   #9
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 7,948
Quote:
Originally Posted by Jeepguy4276 View Post
What difference do you notice? I can't imagine the minute change in mpg's would be noticeable and I would think it warms up fast even with our cold temps. I guess I don't know what difference I might notice. You know the temps we deal with. I was thinking the thicker may help since the axels take a bit of pounding here. They tires spin on ice then catch hard as the hit dry pavement.

So what differences should I be noticing?
In the rear diff you will not notice any change besides a very small drop in mpg's in the very cold,but your getting bad mpg's anyway so another .1 mpg drop will not be noticed.

Cold weather performance between 75w-90,57w-140,80w-90,and 85w-140 is not really noticeable since they all are 75w through 85w when cold,it's the hot performance that changes.
__________________
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
tjkj2002 is offline   Reply With Quote
Unread 11-19-2013, 12:21 PM   #10
2007LIB
Registered User
2007 KJ Liberty 
 
Join Date: Sep 2013
Location: Ajax, Ontario
Posts: 57
Quote:
Originally Posted by tjkj2002 View Post
In the rear diff you will not notice any change besides a very small drop in mpg's in the very cold,but your getting bad mpg's anyway so another .1 mpg drop will not be noticed.

Cold weather performance between 75w-90,57w-140,80w-90,and 85w-140 is not really noticeable since they all are 75w through 85w when cold,it's the hot performance that changes.
The most wear of any gear train occurs at startup when it is cold regardless of outside temperature and it is prudent to alleviate this wear by using a product that starts working as quick as possible to lubricate the gears.
I have noticed in the past that Synthetic oil is a lot cleaner than ground oil when it is changed and gives me a gut feeling of giving me more power .
I think the extra price is worth it and feel more secure in knowing that I have the best protection around.
The extra mileage also indicates that the lubrication is better.
However, everyone is different, just like the oil....
__________________
If it ain't broke don't fix it.....Enjoy it.
2007LIB is offline   Reply With Quote
Unread 11-19-2013, 12:36 PM   #11
2007LIB
Registered User
2007 KJ Liberty 
 
Join Date: Sep 2013
Location: Ajax, Ontario
Posts: 57
Quote:
Originally Posted by 2007LIB View Post
The most wear of any gear train occurs at startup when it is cold regardless of outside temperature and it is prudent to alleviate this wear by using a product that starts working as quick as possible to lubricate the gears.
I have noticed in the past that Synthetic oil is a lot cleaner than ground oil when it is changed and gives me a gut feeling of giving me more power .
I think the extra price is worth it and feel more secure in knowing that I have the best protection around.
The extra mileage also indicates that the lubrication is better.
However, everyone is different, just like the oil....
Just a footnote....
I have also been using Slick 50 in my engines for about 20 years and swear by it(took a Chrysler 2L 4 banger to 300,000 km and still going).
__________________
If it ain't broke don't fix it.....Enjoy it.
2007LIB is offline   Reply With Quote
Unread 11-19-2013, 12:44 PM   #12
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 7,948
Quote:
Originally Posted by 2007LIB View Post
The most wear of any gear train occurs at startup when it is cold regardless of outside temperature and it is prudent to alleviate this wear by using a product that starts working as quick as possible to lubricate the gears.
I have noticed in the past that Synthetic oil is a lot cleaner than ground oil when it is changed and gives me a gut feeling of giving me more power .
I think the extra price is worth it and feel more secure in knowing that I have the best protection around.
The extra mileage also indicates that the lubrication is better.
However, everyone is different, just like the oil....
For differentials and there splash oiled system synthetic gear oil is the worst.What makes synthetic oil great in a forced oiled system(has a oil pump) like cold flow rate makes it bad in a diff that relies on just a ring gear to "splash" the oil over everything that needs to be lubed.Conventional gear oil,while less flowing, will stay in place better for better lubrication,also will transfer heat better,and the shear strength is better since diff are not a forced oiled system.

Dino gear oil will look worse after some time but it does it's job much better.All newer vehicles have very short OCI's on syn gear oil since it does not protect diffs very well.Just look at 2 of the best aftermarket axle builder,Currie and Hi9,and for there hard core axles they demand 85w-140 non-syn gear oil only as syn gear oil will not protect and destroy those diffs in short order.


My $4000 rear axle is best protected by $4.99 a qt 85w-140 non-syn.I can change out my rear diff fluid(3qts for change out) for the price of 1qt of syn gear oil.
__________________
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
tjkj2002 is offline   Reply With Quote
Unread 11-19-2013, 12:47 PM   #13
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 7,948
Quote:
Originally Posted by 2007LIB View Post
Just a footnote....
I have also been using Slick 50 in my engines for about 20 years and swear by it(took a Chrysler 2L 4 banger to 300,000 km and still going).
Just a footnote............

Sold my fathers(just passed away) '01 F250 PS with 802,000 miles(not KM) on the original engine,only used Cenex CO-OP 15w40 non-syn oil changed every 5,000 miles.
__________________
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
tjkj2002 is offline   Reply With Quote
Unread 11-19-2013, 01:01 PM   #14
2007LIB
Registered User
2007 KJ Liberty 
 
Join Date: Sep 2013
Location: Ajax, Ontario
Posts: 57
Quote:
Originally Posted by tjkj2002 View Post
Just a footnote............

Sold my fathers(just passed away) '01 F250 PS with 802,000 miles(not KM) on the original engine,only used Cenex CO-OP 15w40 non-syn oil changed every 5,000 miles.
Wow.......got me there....I'm glad there are different opinions and points of view out there otherwise it would be a very boring forum and a world full of robots.
__________________
If it ain't broke don't fix it.....Enjoy it.
2007LIB is offline   Reply With Quote
Unread 11-19-2013, 01:03 PM   #15
2007LIB
Registered User
2007 KJ Liberty 
 
Join Date: Sep 2013
Location: Ajax, Ontario
Posts: 57
And my condolences to you and your family.
__________________
If it ain't broke don't fix it.....Enjoy it.
2007LIB is offline   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.