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#4468003 - 07/23/17 12:51 PM Red Line Power Steering Fluid VOA
AP9 Offline


Registered: 07/10/13
Posts: 278
Loc: Chicago suburbs
After just going through a little debacle with having to replace the power steering pump and lines in the Impala SS after the pulley shaft bearing completely destroyed itself, I decided to spend a few extra dollars on Red Line power steering fluid, despite the fact that I have quite a surplus of Maxlife ATF, Castrol Mercon V, Valvoline Mercon V, and Mobil 1 ATF.

So.....in the spirit of contributing to the global BITOG knowledge database:



While I cannot disclose the specifics of GM p/s fluid spec 9985010, here are a few observations:
  • Flash point is well within spec (shouldn't be a surprise)
  • Kinematic viscosity of this sample looks a tad bit on the low side compared to spec'd initial KV, even slightly lower than Red Line's published "typical" viscosity after shear.
  • Zinc and phosphorus both exceed the spec'd minimums by a significant margin.*


*Let's expound on that last one. Time and time again, I have read people make the argument that ATF (and sometimes ISO 32 hydraulic oil) is "good enough" for most power steering systems. I don't want to split hairs since practically speaking it may only make a marginal or even imperceptible difference (laboratory test environment vs. real-world automotive environment), but I challenge anyone to name a so-called "Dex/Merc" ATF that is rich in zinc. While power steering systems are relatively straightforward hydraulically compared to transmissions, the fluid may still be pressurized to 1200+ psi and temperatures of 125C or higher are not uncommon.

Conclusion: Use with confidence!
_________________________
2000 Ford Explorer XLT 4WD (4.0L OHV): VML 20W50+PP 10W30+T5 10W30+Peak 5W30/10W40, burning oil faster than a 2-cycle
1996 Chevrolet Impala SS: M1HM 5W30

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#4468014 - 07/23/17 01:08 PM Re: Red Line Power Steering Fluid VOA [Re: AP9]
Linctex Offline


Registered: 12/31/16
Posts: 5694
Loc: Waco, TX
wow... that's a TON of phosphorus and Zinc!
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4468020 - 07/23/17 01:19 PM Re: Red Line Power Steering Fluid VOA [Re: AP9]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4717
Loc: Houston, Texas
What's the difference between this and motor oil? I wonder if you could add a quart of this to an oil sump just to up the zddp level a bit?
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4468042 - 07/23/17 01:58 PM Re: Red Line Power Steering Fluid VOA [Re: AP9]
bullwinkle Online   confused


Registered: 10/09/04
Posts: 7472
Loc: Cincinnati, OH, USA
RL PS fluid is good stuff-my Hydroboost systems, namely the GMC C3500 in my sig, was burning regular fluid, turning it black, and ruined both the PS pump and Hydroboost booster. Changed the parts, bit the bullet & bought Red Line PS fluid for it, it's stayed cherry red & worked well ever since. Can't underestimate how important good brakes are when towing or hauling a lot of weight!
_________________________
06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 15 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)

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#4468081 - 07/23/17 02:51 PM Re: Red Line Power Steering Fluid VOA [Re: AP9]
MolaKule Offline


Registered: 06/05/02
Posts: 18945
Loc: Iowegia - USA
You have just disclosed the reason why I have in the past recommended Redline PS fluid for Manual Transmissions which require an ATF-like viscosity of 6.0 to 7.5 cSt fluid.


Quote:
What's the difference between this and motor oil? I wonder if you could add a quart of this to an oil sump just to up the zddp level a bit?


Mainly viscosity, friction modifiers, and seal compatibility.


And no, I would not add this to engine oil.


Edited by MolaKule (07/23/17 02:53 PM)
_________________________
Hatito Hakiwisilaasamamo Waswasimamo Howisiwapani - Shawnee for: "Hello," "Good Morning," and "here's hoping you feel good." smile

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#4468403 - 07/23/17 08:54 PM Re: Red Line Power Steering Fluid VOA [Re: Linctex]
69GTX Offline


Registered: 09/23/15
Posts: 3742
Loc: Connecticut
Originally Posted By: Linctex
wow... that's a TON of phosphorus and Zinc!


And Calcium too. Tons more than used in typical 40 grade passenger car Synthetic Motor Oils. Much closer to rear diff gear oil specs. ATF's look nothing like this with typically 100-600 ppm of major ingredients (Ca, Phos, Zn, Boron). A typical Amsoil ATF might only have a TOTAL of 1000-1200 ppm in combined anti-wear and other additives. That said, I've rarely (if ever?) had a PS pump or rack failure using ATF's for 150K-230K miles.
_________________________
----------------

2002 Lincoln Cont 4.6L DOHC/ 81K mi /PPlat 5w30/FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs

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#4469000 - 07/24/17 02:28 PM Re: Red Line Power Steering Fluid VOA [Re: AP9]
CT8 Offline


Registered: 10/09/14
Posts: 10547
Loc: Idaho
Why does the high zinc bad for engines become good for P.S. units which are no more than a low pressure hydraulic set up?
_________________________
Artificial intelligence is no match for natural stupidity, we shall prevail

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#4469336 - 07/24/17 08:26 PM Re: Red Line Power Steering Fluid VOA [Re: CT8]
AP9 Offline


Registered: 07/10/13
Posts: 278
Loc: Chicago suburbs
Bad for catalytic converters, yes, but I don't remember anyone saying zinc is bad for engines. ZDDP is a highly effective wear inhibitor.
_________________________
2000 Ford Explorer XLT 4WD (4.0L OHV): VML 20W50+PP 10W30+T5 10W30+Peak 5W30/10W40, burning oil faster than a 2-cycle
1996 Chevrolet Impala SS: M1HM 5W30

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#4469593 - 07/25/17 04:40 AM Re: Red Line Power Steering Fluid VOA [Re: AP9]
DoubleWasp Offline


Registered: 05/21/12
Posts: 5227
Loc: Fort Lauderdale, FL
Wow. I need to drop my fill and get with this.
_________________________
07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio

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#4470190 - 07/25/17 04:10 PM Re: Red Line Power Steering Fluid VOA [Re: AP9]
NYSteve Offline


Registered: 12/26/06
Posts: 442
Loc: Killadelphia
Will be putting this in after I replace my PS pump. Redline says it's good to go for systems that call for ATF.

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#4470191 - 07/25/17 04:11 PM Re: Red Line Power Steering Fluid VOA [Re: AP9]
NYSteve Offline


Registered: 12/26/06
Posts: 442
Loc: Killadelphia
Will be putting this in after I replace my PS pump. Redline says it's good to go for systems that call for ATF.

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#4472551 - 07/27/17 11:17 PM Re: Red Line Power Steering Fluid VOA [Re: NYSteve]
MolaKule Offline


Registered: 06/05/02
Posts: 18945
Loc: Iowegia - USA
Originally Posted By: NYSteve
Will be putting this in after I replace my PS pump. Redline says it's good to go for systems that call for ATF.



I seriously seriously doubt this fluid would be suitable in any AT or engine because of the additive package.

As I stated before, it works well in MT's that specify an ATF.
_________________________
Hatito Hakiwisilaasamamo Waswasimamo Howisiwapani - Shawnee for: "Hello," "Good Morning," and "here's hoping you feel good." smile

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#4475946 - 07/31/17 08:02 PM Re: Red Line Power Steering Fluid VOA [Re: AP9]
Sam_Julier Offline


Registered: 05/22/12
Posts: 417
Loc: Connecticut
I removed the Redline PS Fluid from my 93 240. At temperatures below 0 degrees F the pump - a GM TYpe II - squealed terribly at start up. Since I winter in Stowe VT it concerned me. I now run Castrol Full Syn MV ATF and have no cold start squealing. My coldest temperature last winter was - 12 F. Car is left outside all night.
_________________________
2005 Highlander 3.3L PD Duron 0W30, 45k
1993 Volvo 245 Delo 10W30, 138k
1993 Volvo 244 VPB 10W30, 148k


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#4545129 - 10/16/17 12:42 PM Re: Red Line Power Steering Fluid VOA [Re: AP9]
SubieRubyRoo Offline


Registered: 05/14/12
Posts: 861
Loc: Winchester, Indiana
Molakule, If I were to do a drain and flush, would this fluid suffice to replace Honda PS fluid? Honda pumps (at least the Odysseys) seem to be notorious for self-destructing. I know the Honda fluid is typically thicker, but what characteristics would make it insufficient if it was the only fluid in the system? Thanks!

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#4545176 - 10/16/17 01:44 PM Re: Red Line Power Steering Fluid VOA [Re: Sam_Julier]
bmwjohn Offline


Registered: 01/04/08
Posts: 728
Loc: indianapolis in
Sam Julier, would MOBIL 1 ATF be the same as the Castrol ATF you are using in terms of performance? 1990 and 1992 high mileage 240's, turkey baster (Dollar Tree) at hand, dubious maintenance previous owners. Thanks!

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