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#3373344 - 05/16/14 02:24 PM Power Steering Fluid vrs. Hydraulic AW ISO 68
ARHND Offline


Registered: 06/13/12
Posts: 18
Loc: Honduras
URGENT!!!

I have a customer that insists on using Hydraulic AW ISO 68 as his Power Steering fluid in a Toyota Corolla 2000.

If somebody has a comparison, damages and problemas that could happen on doing this please.

Thanks to all of you

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#3373356 - 05/16/14 02:52 PM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: ARHND]
901Memphis Offline


Registered: 08/14/10
Posts: 6041
Loc: Northern Kentucky
Power steering systems are hydraulic systems, so it's not crazy that someone would want to use another fluid. From what I remember Toyotas aren't picky about what fluid you use as far as genuine power steering fluid vs Dexron atf, so hydraulic fluid should be fine. The viscosity of the ISO 68 is 8.5 cSt @ 100ºC.
_________________________
1999 Ford Taurus 145k (Vulcan v6) - M1 High Mileage 5w30 | Fram Ultra XG 3600
2002 Buick Century 102k - PU 5w30 / Fram Ultra XG 3980 / Filter mag

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#3373359 - 05/16/14 02:56 PM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: ARHND]
tinmanSC Online   content


Registered: 09/07/10
Posts: 1948
Loc: Oswego, IL
When you are using transmission fluid (i.e. Dexron) in your power steering system, all you're really doing is using transmission fluid as hydraulic oil. Probably be no problem.
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#3373368 - 05/16/14 03:06 PM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: ARHND]
901Memphis Offline


Registered: 08/14/10
Posts: 6041
Loc: Northern Kentucky
The ISO 68 is 8.5 cSt @ 100ºC like I said before and the Toyota manual calls for dexron 2 or 3. Dexron 3 has a maximum viscosity of 7.5 cSt @ 100ºC, so the ISO is marginally thicker than necessary but should be fine.

Some power steering systems are picky, like Acura/Honda but not Toyotas.
_________________________
1999 Ford Taurus 145k (Vulcan v6) - M1 High Mileage 5w30 | Fram Ultra XG 3600
2002 Buick Century 102k - PU 5w30 / Fram Ultra XG 3980 / Filter mag

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#3373438 - 05/16/14 04:34 PM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: ARHND]
JosephHarmon Offline


Registered: 05/23/11
Posts: 244
Loc: Eagan, Mn
Consideration is needed for operating temperature.

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#3373456 - 05/16/14 05:06 PM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: ARHND]
EyesofThunder Offline


Registered: 02/24/10
Posts: 45
Loc: North Central Illinois
I would keep Dex II/III in there. The friction modifiers are specific for it. It might cause chatter in the steering with an unknown fluid.

Ultimately it is his car, if he asks you to do it, it is on him for issues.



Edited by EyesofThunder (05/16/14 05:08 PM)

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#3373465 - 05/16/14 05:14 PM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: EyesofThunder]
Kira Offline


Registered: 08/19/10
Posts: 1102
Loc: Champlain/Hudson Valley
Hello, Did you ask him why?

1) Got the AW ISO 68 for free or had it lying around
2) Was told to use it by a friend
3) Just a general 'know-it-aller'
Kira

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#3375489 - 05/19/14 10:06 AM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: 901Memphis]
ARHND Offline


Registered: 06/13/12
Posts: 18
Loc: Honduras
Thanks a lot for your obswevation,

Regards

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#3375491 - 05/19/14 10:08 AM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: Kira]
ARHND Offline


Registered: 06/13/12
Posts: 18
Loc: Honduras
He used it just because he wanted to prove that nothing happened.

Thanks

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#3375501 - 05/19/14 10:14 AM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: ARHND]
ARHND Offline


Registered: 06/13/12
Posts: 18
Loc: Honduras
Guys is the viscosity of Power Steering 7.5 cSt? or whatg is it?

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#3377378 - 05/21/14 12:59 PM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: ARHND]
MolaKule Offline


Registered: 06/05/02
Posts: 14643
Loc: Midwest
Originally Posted By: ARHND
He used it just because he wanted to prove that nothing happened.

Thanks


An event happening in the short term or long term????

If it was my shop I would not guarantee any work for him.
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#3377386 - 05/21/14 01:13 PM Re: Power Steering Fluid vrs. Hydraulic AW ISO 68 [Re: ARHND]
MolaKule Offline


Registered: 06/05/02
Posts: 14643
Loc: Midwest
Originally Posted By: ARHND
Guys is the viscosity of Power Steering 7.5 cSt? or whatg is it?


http://www.bobistheoilguy.com/viscosity-charts/

An ISO 68 hydraulic oil would be slightly thicker at 8.5 cSt to 9.6 cSt verses a DexronIII-like ATF at 7.5 cSt.

While an application specific PSF, ATF, and the ISO AW 68 are all hydraulic oils, each uses a different PI (additive) package and mix of base oils.


Edited by MolaKule (05/21/14 01:21 PM)
_________________________
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