Autozone sells their store brand PS fluid, which states that it meets MS-5931 standards. Is it okay to use that or should I be buying the more expensive MOPAR fluid? Anybody have a favorite fluid? Same question for brake fluid....
MOPAR or Ms-5931 Compliant Power Steering Fluid?
luvmyglock
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What isn't true? That ATF and PSF are similar/basically the same thing? I mean if you want to send a link of a data sheet that proves they aren't then I'll retract my statement but I cannot see ATF+4 not being extremely similar to MOPAR PSF+4.
As far as I know they are both hydraulic fluids. They are both in closed systems. ATFs have more friction additives but that doesn't make it a completely different oil.
The only PS fluids that are significantly different from AT fluids is GM spec'd and Honda spec'd PS fluids; again, AFAIK
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Dang guys.... Originally mopar PSF MS-5931 was the recommend part and what jeep put in the earlier WJs, later down the road jeep had a service bulletin that made ATF4 supersed the PSF But not for WJs.
System check to see what's currently in there. Gold looks like oil = PSF
Red/Pink = ATF4
Brown/Milky/Black/Clear = drain & flush system ASAP after proper flush refill with MS-5931 or compatible fluid that meets spec (I like AmsOil)
System check to see what's currently in there. Gold looks like oil = PSF
Red/Pink = ATF4
Brown/Milky/Black/Clear = drain & flush system ASAP after proper flush refill with MS-5931 or compatible fluid that meets spec (I like AmsOil)
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Also, don't mix ATF& PSF.
I used AmsOil in most places I can, it's good stuff
I used AmsOil in most places I can, it's good stuff
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Definitely....it specifically warns against using atf in the FSM.....why risk damage to the very expensive hydro fan system just to save a few quid.
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I stand corrected I'll delete the incorrect info in my other post so I don't help pass bad info
I asked for MS-5931 for a 2004 GC Grand Cherokee 6cyl at the Baton Rouge, LA dealer and was handed MS-9602, which does not state anything regarding compatibility on its label. Mopar does not show any power steering fluids at their site. I need reliable info, understanding that an incompatible fluid could cost $$$ in repairs.
I have not found any MS-5931 compatible fluid at the MOPAR site.
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******Supposedly****** MS9602 supersedes MS5931 reading other forums. But if we want to be literal here, then don't use it. Find one that has MS5931 spec. I'll keep digging for the supersede info
Edit: Looks like MS9602 does supersede it, but after just taking an extra minute of searching, found this post on our very own subforum
https://www.jeepforum.com/forum/f13/p-s-fluid-questions-ms5931-919291/#post8426766
[snip]
[/snip]Read this on WJJeeps:
I didn't know this when I first got my Jeep and I'm pretty sure I topped it off with ATF+4. Am I screwed? I haven't had any issues at all and it's been about a year and a half. Do you all adhere to this pretty well? Any experience deviating from this? Where is the best place to buy MS5931?
I used the Redline product speednjay advised. I had purchased from a local Fiat/Jeep dealer and they supplied a Petronas Fluid that has no Chrysler/Jeep compatible numbers and says it meets Dexron 11D, talking to a Jeep man he said 'No it will mess it up'' he didn't actually say 'mess' but I think you can guess the words? He supplied me the Redline and I have had no trouble at all.
I know many of us have recommended the "Valvoline Power Steering Fluid" which meets the MS-5931 spec, is amber colored, and comes in the blue & white bottle.
Unfortunately it looks like Valvoline isn't making that power steering fluid anymore. In doing a search of their site I'm only seeing the "Valvoline Pro-V Racing Power Steering Fluid" where they don't even list the specs and who needs a 5-gallon pail of it??
https://www.valvoline.com/our-products/pro-v-racing/power-steering-fluid
There are some stores and sites which are still selling the regular "Valvoline Power Steering Fluid" but at higher prices with dwindling stocks.
Amazon sure isn't the place to buy it with referring you to 3rd parties where they're selling it for $30+/gallon. Only posting this for the photo and part number for anyone looking for a whole gallon.
https://www.amazon.com/Valvoline-Power-Steering-Fluid-799222/dp/B00J65IHT6
Luckily I have a full gallon of it down the basement and still planning on flushing out my power steering/hydraulic fan system with it in my 04 4.7 if I ever get around to it. Think I paid $16 for a gallon (part number 799222) at Advance and in doing a search there it's showing $22/gal if they have it in stock.
Believe Valvoline just made a typo/error on the label on my gallon. It says meets Chrysler 5391 spec when believe the actual spec is 5931. Way to go Valvoline in discontinuing a good product plus not even knowing how to type out the correct MS-5931 spec!
Unfortunately it looks like Valvoline isn't making that power steering fluid anymore. In doing a search of their site I'm only seeing the "Valvoline Pro-V Racing Power Steering Fluid" where they don't even list the specs and who needs a 5-gallon pail of it??
https://www.valvoline.com/our-products/pro-v-racing/power-steering-fluid
There are some stores and sites which are still selling the regular "Valvoline Power Steering Fluid" but at higher prices with dwindling stocks.
Amazon sure isn't the place to buy it with referring you to 3rd parties where they're selling it for $30+/gallon. Only posting this for the photo and part number for anyone looking for a whole gallon.
https://www.amazon.com/Valvoline-Power-Steering-Fluid-799222/dp/B00J65IHT6
Luckily I have a full gallon of it down the basement and still planning on flushing out my power steering/hydraulic fan system with it in my 04 4.7 if I ever get around to it. Think I paid $16 for a gallon (part number 799222) at Advance and in doing a search there it's showing $22/gal if they have it in stock.
Believe Valvoline just made a typo/error on the label on my gallon. It says meets Chrysler 5391 spec when believe the actual spec is 5931. Way to go Valvoline in discontinuing a good product plus not even knowing how to type out the correct MS-5931 spec!
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Thanks for that update.
I'm wondering if ATF+4 doesn't matter in non-hydraulic fan setups (revisiting what I said above years ago).
I'd be willing to be the guinea pig but I just replaced my power steering fluid 2 years ago.
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No problem. I was part of that thread over on the ZJ forum a long time ago you posted a link to before. That info on the power steering fluid specs came from that section on wjjeeps below.
http://www.wjjeeps.com/service/maintenance_wj.htm
Years ago I asked the local dealer parts manager I've known for 25 years what he thought about using Mopar ATF+4 (MS-9602) instead of the amber MS-5931 spec Mopar power steering fluid they discontinued? He said, "normally Chrysler goes up in spec and not down".
While I bought some of the red Mopar ATF+4 what they considered power steering fluid I never installed it.
There's a long-term member (86cj74.2L) who posted earlier in this thread who said he won't install the ATF+4 in his 04 4.7 which has the hydraulic fan like mine. I thought I remember reading another thread he was in where he mentioned a leaking power steering system on a WJ using the ATF+4 fluid which wasn't leaking before with the amber PS fluid in it. Not sure what the differences are in viscosity if any?
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Hmmmmm, I'm still not fully convinced quite yet that they can't be used on hydraulic systems. Maybe I haven't seen a full explanation yet - it's just weird that these two hydraulic fluids meant for closed systems are that far apart.
Yes, 86cj74.2L and I have shared some ideas back and forth on other topics in the past. Hey @86cj74.2L I'd like to drag you back into this since you directly had problems using ATF+4 in your system.
Do you know why there was a fluid leak with ATF+4? Or know why specifically it can't be used? Again, I don't really see these two fluids being that different.
What I'm currently wondering if MS5931 and ATF+4 is similar to conventional vs synthetic engine oil. I'm prefacing this with me spitballing so I am not thinking this is the reason. People used to think synthetic oils caused leaks in cars but that isn't the case. It was typically due to conventional oils not cleaning the best, leaving deposits around gaskets, those gaskets would dry up. Then when people switched to a synthetic based oil, the synthetic usually did a better job of cleaning, wiping those deposits, leaving a slight leak because the gasket dried out from not getting oiled.
I'm wondering if this is the same scenario since ATF+4 is, I think, a synthetic based lubricant whereas the MS-5931 lubricant is not (I THINK). Maybe the ATF+4 being synthetic and MAY have more cleaning additives would cause the same scenario if there were deposits etc around power steering seals? I can look up the contents/additives of ATF+4 on https://pqia.org/automatic-transmission-fluid/ but I can't really find power steering additives anywhere.
Or if you have any other ideas I'd like to hear them.
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from another jeep site, here's an oreilly brand that specifically states it meets the req of ms5931 and references hydroboost systems. seems pretty legit- im gonna try it for $6.49
https://www.oreillyauto.com/detail/...id-17777/234aa45b17fe/o-reilly-power-steering-fluid-1-quart/72810/4600002?pos=0
https://www.oreillyauto.com/detail/...id-17777/234aa45b17fe/o-reilly-power-steering-fluid-1-quart/72810/4600002?pos=0
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