[elToro]

Manual calls for 80w-90 in the diff. I want to do a change and go with Synthetic. All I can find in full syn is 75w-90. Is that ok to use? Why no syn in 80w-90?

 

[joe002]

Maybe just to be perfectly safe you should just go to your local Chrysler dealer and get the oil and additive from them? I use Mopar filters and also use their ATF fluid. I'm sure their products are OK and you’ll have no worries at all about your warrantee - just keep the receipt. Why mess with aftermarket oil when you know for sure the Chrysler is perfect? It’s not wort it.

 

[WatchThis!]

Maybe just to be perfectly safe you should just go to your local Chrysler dealer and get the oil and additive from them? I use Mopar filters and also use their ATF fluid. I'm sure their products are OK and you’ll have no worries at all about your warrantee - just keep the receipt. Why mess with aftermarket oil when you know for sure the Chrysler is perfect? It’s not wort it.

Really?

 

[joe002]

Really?

Based on another thread the OP is terribly concerned with his warrantee - nothing wrong with that. If he uses Mopar fluids he will have no worries about his warrantee. Why worry, just use the Mopar fluids.

 

[elToro]

Valid point but I despise having to go to my dealer (they try to hose me every time!), which is why I am trying to find the proper aftermarket fluid.

 

[CG3]

Valid point but I despise having to go to my dealer (they try to hose me every time!), which is why I am trying to find the proper aftermarket fluid.

why not try a different dealer?

i'm not big on getting anything done at the dealership - but geez, if they have something I want/need - and are decent guys... I'll sure go - and on the verso, if they aren't decent guys - I'd be hunting down another dealer?

or maybe there's only 1 dealer within normal driving distance...

 

[joe002]

Valid point but I despise having to go to my dealer (they try to hose me every time!), which is why I am trying to find the proper aftermarket fluid.

Maybe you need to build a better relationship with your dealer or find another one? So far my dealer has been really good about warranty work, and the parts department gives pretty good "Jeep" discounts. I even got my AEV wheels from them - they're AEV dealers and had good pricing. The biggest problem with my dealer is they're 40 miles from my house.

I change my engine oil every 3,000 miles so I just use Penzoil dino - it's MS-6395, the correct weight, a better SAE grade, and I can get it from stores 1 mile from my house for a great price.

For the ATF, I only want Mopar ATF+4. I know there’s a site that identifies which oils are certified to meet the +4 standard, but I don’t replace my transmission and transfer case fluids a lot, and the Mopar ATF+4 is already synthetic, and my dealer has pretty good pricing on it. The only drawback is the drive.

For my gears I use the Valvoline SynPower Full Synthetic 75w90. I’m running 5.38s, so I want a gear oil that is better than the minimum. In addition to GL-5 (the minimum), it meets MT-1 and SAE J2360. The only thing that is “out of spec” is that it’s a 75w-90 instead of 80w-90. Two things on that. If you are towing then Chrysler recommends 75W-140 - note that it’s a 75W not an 80W, and the only time you are at the 75W is when your diff is really cold. Once you warm it up a bit it moves toward the higher number. Remember - they already recommend a 75W something for the gears.

I think there’s at least 3 things to consider when replacing fluids: warranty, price, performance. If you are really concerned a lot about warranty then just stick with the Mopar products - they will work. I’m sticking to Mopar for my transmission and transfer case. If price is an issue, then I look for the lowest cost fluid that meets some standard by Chrysler. My engine oil actually meets or exceeds the recommended standards and costs a lot less (I used to be able to get it for $1 a quart, then $2, now it’s $3). If you are looking for performance, then the fluid should easily meet the Chrysler recommendations, but will have some additional standards it meets - like my gear oil.

For me, the engine is price, transmission/transfer case is warranty, gears are performance. I haven’t flushed my radiator yet, but it looks like they specify some funky newish standard, so I may go with Mopar on that too - not sure yet. Brake fluid I top it off with the recommend (non-Mopar) type.

You just need to pick the combination(s) that suit you the best.

 

[steed77]

I Just changed out my 2012 OEM fluid with Mobil 1 75w-90. They did not have the 80w-90 in a brand (or full synthetic) I typically like. The only full synthetic on the shelf was Mobil 1.

I do NOT see an issue with the 2. Changing it is better than not. Go for it.

 

[SilverSport]

I call bullshit. The OP doesn't have to use Mopar fluids in order to not have to worry about his warranty. As long as the fluids he uses meet the Chrysler specs, his warranty can't be voided because he didn't Mopar brand. Research Magnusson-Moss Act. unk: :nonono:

75W-90 synthetic became available when oil companies discovered the benefits of synthetics; they claim the 75W-90 helps a tiny bit compared to an 80W-90 conventional lube while offering the same or better wear protection.
BTW: I know you don't want me to say it but Amsoil still makes a synthetic 80W-90.

 

[countrybassist]

I call bullshit. The OP doesn't have to use Mopar fluids in order to not have to worry about his warranty. As long as the fluids he uses meet the Chrysler specs, his warranty can't be voided because he didn't Mopar brand. Research Magnusson-Moss Act. unk: :nonono:

This is true.

 

[joe002]

...I call bullshit. The OP doesn't have to use Mopar fluids in order to not have to worry about his warranty. As long as the fluids he uses meet the Chrysler specs, his warranty can't be voided because he didn't Mopar brand. Research Magnusson-Moss Act. unk: :nonono:

You are correct - legally. I know lots of people here say they'll take their dealership/Chrysler to court and win... Some find it easier to just use things that don’t require the legal system. It's all a personal decision.

 

[SilverSport]

Well I am not hatin on folks who have a good rep with their dealer and choose to use the automakers fluids. It just bothers me that some dealers are either ignorant about the law or purposely lead customers to believe if they don't use automaker fluids, filters, part, etc their warranty is or could be voided.

My dealer and the local auto parts stores are all about the same distance from me. Makes no sense for me to go to the dealer and buy a gallon of Mopar antifreeze for $20+ when the local NAPA has the same HOAT antifreeze (Zerex G0-5) for $15 a gallon. Who ever makes it for Moapr dyes theirs pink/red. The Zerex is yellow, but same exact chemicals in it.

 

[joe002]

Well I am not hatin on folks who have a good rep with their dealer and choose to use the automakers fluids. It just bothers me that some dealers are either ignorant about the law or purposely lead customers to believe if they don't use automaker fluids, filters, part, etc their warranty is or could be voided.

My dealer and the local auto parts stores are all about the same distance from me. Makes no sense for me to go to the dealer and buy a gallon of Mopar antifreeze for $20+ when the local NAPA has the same HOAT antifreeze (Zerex G0-5) for $15 a gallon. Who ever makes it for Moapr dyes theirs pink/red. The Zerex is yellow, but same exact chemicals in it.

Yeah, I with you - I use many non-Mopar fluids in my Jeep.

Some people are really really really concerned about their warrantee, and for peace of mind it makes sense (to me) for them to just use just use the Mopar fluids. They aren't cheaper, and they aren't better, but it gives some peace of mind, and in the grand scheme of things it isn't a big cost.

I know the Magnusson-Moss Act comes up in many threads. Who really wants to take their dealership/Chrysler to court, even though they have the Act on their side? I have lawyers on retainer and I'm not really inclined to use them - I personally would prefer to handle things out of court, but like I said I have them on retainer - just in case.

 

[SilverSport]

I hear you. In this case the OP doesn't seem to like going to his dealer. And I can understand his concern about the owners manual stating to use 80W-90 but he couldn't find any in synthetic. I posted in his other thread why 75W-90 synthetic is an acceptable substitute. Kudos to the OP for caring about maintenance on his Jeep.

 

[elToro]

I hear you. In this case the OP doesn't seem to like going to his dealer. And I can understand his concern about the owners manual stating to use 80W-90 but he couldn't find any in synthetic. I posted in his other thread why 75W-90 synthetic is an acceptable substitute. Kudos to the OP for caring about maintenance on his Jeep.

Thanks, I appreciate your response. My question was not a matter of Mopar vs non-Mopar fluid, it was the weight of the oil. 80W-90 vs 75W-90. So brand of gear oil aside, could they legally void a warranty claim after using a GL5 approved 75W90 synthetic because it is not 80W90 as the manual specifically states?

I understand that mechanically the differntial will operate just fine on either weight, but I've been in warranty battles before (6.0 Ford diesel, what a nightmare!) and in my experince manufacturers will look for any and every experience to void a warranty claim, hence my caution.

 

[elToro]

As long as the fluids he uses meet the Chrysler specs, his warranty can't be voided QUOTE]

And this is what I am worried about... whether 75W90 meets their "specs" when the manual directly calls for 80W90.

 

[joe002]

...I understand that mechanically the differntial will operate just fine on either weight, but I've been in warranty battles before (6.0 Ford diesel, what a nightmare!) and in my experince manufacturers will look for any and every experience to void a warranty claim, hence my caution.

I hear you. I haven't had a warrantee battle yet, but have gone through legal battles - win or lose they aren't fun.

...And this is what I am worried about... whether 75W90 meets their "specs" when the manual directly calls for 80W90.

Logically it sure looks like it meets their combined 80w90 and 75w140 specs. I believe Valvoline has a blended 80w90 that is GL-5 and MT-1.

 

[SilverSport]

Here's a what if: lets suppose you were using a 75W-90 synthetic and you had a carrier bearing go bad in the rear diff. When the tech pulls the rear cover and sees the diff had fluid in it and it smells (as you know gear lube has a very distinctive odor), there is a 99.999999999999999999999% chance he wouldn't question it further. The only way the dealer would know it wasn't 80W-90 would be to pay to send a sample to a lab for analysis. Odds are the dealer wouldn;t go to that extreme.

If you want to stick with 80W-90 there are conventional brands out there. If you want synthetic 80W-90, I know Amsoil makes it. I will see if there are any others and post back.
http://shop.advanceautoparts.com/we...product_DuraBlend-80W-90-Gear-Oil-Valvoline-DuraBlend_7070002-P_N3242_T|GRP2035_____

 

[elToro]

I hear you. I haven't had a warrantee battle yet, but have gone through legal battles - win or lose they aren't fun.



Logically it sure looks like it meets their combined 80w90 and 75w140 specs. I believe Valvoline has a blended 80w90 that is GL-5 and MT-1.

No doubt that it logically does look like it. I totally understand and agree with your reasoning why it would be permitted when they allow the 75w with the heavier duty gear oil, but as we know, legal wranglings (pun intended) aren't always logical!

 

[joe002]

No doubt that it logically does look like it. I totally understand and agree with your reasoning why it would be permitted when they allow the 75w with the heavier duty gear oil, but as we know, legal wranglings (pun intended) aren't always logical!

I agree. Based on your experience, and for your piece of mind, why don't you go with an 80w90? If you get an 80W90 that is at least GL-5, then it's one less thing to worry about.