Differential oil change

[lalalofsky]

Crap, I looked at that manual again that was sent to me. I’m using 87 octane in my Jeep. Am I supposed to use the (NAFTA) fuel selection of 87 Octane or the (Export) 91 RON?

I can send you the information for that from my dealer info.

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[jellis4148]

I can send you the information for that from my dealer info.

please. I’d like to see it. Not being a smart ass, but I work at a Jeep dealership. I pulled parts catalog, service manual, and owners manual. Nothing says 75w-140 for towing. If what you’re sending me says anything about the 2.2 diesel it’s not for North America.

 

[lalalofsky]

is what i just posted before you gas comment wrong, or bad?

The information and specs i can view are for models domestic, and overseas. For instance, the grand wagoner that is available in Brazil, i can see specs for alongside the one for the US.

Also, the 2.2L information i can see alongside every single other Jeep JL motor spec. That doesnt mean its for import or export, the information is consolidated for the techs, as the information is being used by the techs.

 

[lalalofsky]

I think have to believe that youre being misled By the fact that this information shows export and domestic. For fuel selection I can see domestic specs and Export specs, for each engine. That doesnt mean that its wrong or for export only, as that wouldn’t make any logical Sense for Stellantis to creatE. The platform their techs use has all the information consolidated, as it should, into one database.

 

[jellis4148]

Maybe, but why do none of ours have that stuff. I’m talking at the dealership. I honestly knew nothing about a 2.2 diesel till I saw that, and then googled it. That’s not in any of our manuals either. Funny is I checked the manual for a 17 JK and it does state to use 75w-140 if towing.

 

[lalalofsky]

So the information I’m looking at isn’t in a manual, its in a database. This is Stellantis Jeep information. These are the specs I went by, this is not from the manual i repeat. My car manual doesnt show this info.

 

[jellis4148]

So, again not being an ass. I’m sure plenty of eye rolls happening. Not trying to fight with anyone even though it looks like I am. One guy ticked me off telling to kiss his ass for no reason. I Haven’t called anyone names. I’ve read all the owner manuals now from 17-21 and only the JK manual says to do that?

 

[jellis4148]

So the information I’m looking at isn’t in a manual, its in a database. This is Stellantis Jeep information. These are the specs I went by, this is not from the manual i repeat. My car manual doesnt show this info.

And it doesn’t say to 75w-140 if towing. Unless I missed it somewhere. It only says to use it on Dana 35’s.

 

[lalalofsky]

So, again not being an ass. I’m sure plenty of eye rolls happening. Not trying to fight with anyone even though it looks like I am. One guy ticked me off telling to kiss his ass for no reason. I Haven’t called anyone names. I’ve read all the owner manuals now from 17-21 and only the JK manual says to do that?

Not sure what youre getting at? I understand its frustrating, but ive provided for you Stellantis data, if thats not good enough, I’m not sure anything ever will be, and thats not being a jerk, thats just the truth. People in these forums want to share their opinions but sometime too real hard data is being shared, like what i posted. My data is for the JL models.

I never said to use it for towing. It is true though that that weight is better for towing, as easier on the diff. But if youre an OEM guy and you trust the research that Jeep did and thats what you want to follow, then thats what you should follow. There’s nothing wrong with That. I would use what it says you should use int that photo, if thats what you’re comfortable with.

 

[jellis4148]

Not sure what youre getting at? I understand its frustrating, but ive provided for you Stellantis data, if thats not good enough, I’m not sure anything ever will be, and thats not being a jerk, thats just the truth. People in these forums want to share their opinions but sometime too real hard data is being shared, like what i posted. My data is for the JL models.

I typed a message between yours. Now it looks out of order. Like I said a minute ago. It does not state to use that if you are towing from what I saw. Only if using a Dana 35.

 

[jellis4148]

If anybody wants to use 75w-140 any any model of diff they have they can. The point is that saying to use it if you tow is misinformation. You should use it because based off of your own research and opinion it is what you feel is best for your Jeep. Me personally will do what the Jeep service manual says that was just posted.

 

[lalalofsky]

I agree, i think you should use OEM if thats what you want to use

On the other hand, i did my research and chose to go with the 140 weight oil for towing. NOT because the dealer says to, but because based on my research I chose to.

 

[CarbonSteel]

If anybody wants to use 75w-140 any any model of diff they have they can. The point is that saying to use it if you tow is misinformation. You should use it because based off of your own research and opinion it is what you feel is best for your Jeep. Me personally will do what the Jeep service manual says that was just posted.

Run some temperature checks on the oil when towing (or when running at 75+ for extended times) and you will have a clue as to why you should be running higher viscosity oil.

 

[lalalofsky]

If anybody wants to use 75w-140 any any model of diff they have they can. The point is that saying to use it if you tow is misinformation. You should use it because based off of your own research and opinion it is what you feel is best for your Jeep. Me personally will do what the Jeep service manual says that was just posted.

Run some temperature checks on the oil when towing (or when running at 75+ for extended times) and you will have a clue as to why you should be running higher viscosity oil.

Only other thing that comes to mind is Automotive manufacturers care about 2 main things. Safety and Emissions. Running the 75w-140 will reduce you gas mileage by just a hair, and while it can be better for towing, its not worth the loss in emissions performance from the manufacturer, so they offer a weight that will perform well, and not compromise on fuel efficiency

 

[jellis4148]

Run some temperature checks on the oil when towing (or when running at 75+ for extended times) and you will have a clue as to why you should be running higher viscosity oil.

I’m guessing it will be hot, but I don’t run 75. With 4.10 gears and 37’s I stay at 65 or less. Even at 65 I only get 13.5 mpg. 75 would be worse. My best fuel economy comes at 60-65 so I stay with that. It’s a Jeep. I e had plenty of fast cars. Don’t care about speed or being the first anymore.

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