looking for thicker power steering fluid
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Hotshot
Joined: Jul 2013
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looking for thicker power steering fluid
so far, it l;ooks like royal purple is the thickest at 45.0 cSt
the others seem to be bunched up at 32.4 cSt
Synchromax properties are: cSt @ 40°C 35.3 cSt @ 100°C 7.7
RP's powersteering fluid: cSt @ 40°C 45.0 cSt @ 100°C 9.0 RP's
RP's ATF: cSt @ 40°C 32.4 cSt @ 100°C 7.4
Mobil 1 Syn. ATF cSt @ 40º C 34 cSt @ 100º C 7.6
ATF (type D,F or G) or Pentosin CH11S. cSt@40deg / cSt@100deg Pentosin: 18.7 / 6.0 ATF: 43.2 / 8.3
Lucas PS fluid Viscosity cSt at 100o C: Greater than or equal to: 8.9
Quaker state PS fluid Viscosity @ 40 C: 39 cSt
Castrol PS fluid Viscosity @ 40 C: 39 cSt
Pennzoil Power Steering Fluid Kinematic viscosity : Typical 37.3 mm2/s at 40 °C / 104 °F
Napa power steering fluid Viscosity (method, temp): 32 cSt @ 40C
AMSOIL PS fluid Viscosity, cSt @ 40 C................................................. ......................... 32.2
Redline power steering fluid Vis @ 40°C 34.7 cSt
Lube guard 1.8 – 33.8 cSt @ 40° C (104° F)
Mercon LV Viscosity: cSt @100°C 6.0 cSt @ 40°C 29.6
the others seem to be bunched up at 32.4 cSt
Synchromax properties are: cSt @ 40°C 35.3 cSt @ 100°C 7.7
RP's powersteering fluid: cSt @ 40°C 45.0 cSt @ 100°C 9.0 RP's
RP's ATF: cSt @ 40°C 32.4 cSt @ 100°C 7.4
Mobil 1 Syn. ATF cSt @ 40º C 34 cSt @ 100º C 7.6
ATF (type D,F or G) or Pentosin CH11S. cSt@40deg / cSt@100deg Pentosin: 18.7 / 6.0 ATF: 43.2 / 8.3
Lucas PS fluid Viscosity cSt at 100o C: Greater than or equal to: 8.9
Quaker state PS fluid Viscosity @ 40 C: 39 cSt
Castrol PS fluid Viscosity @ 40 C: 39 cSt
Pennzoil Power Steering Fluid Kinematic viscosity : Typical 37.3 mm2/s at 40 °C / 104 °F
Napa power steering fluid Viscosity (method, temp): 32 cSt @ 40C
AMSOIL PS fluid Viscosity, cSt @ 40 C................................................. ......................... 32.2
Redline power steering fluid Vis @ 40°C 34.7 cSt
Lube guard 1.8 – 33.8 cSt @ 40° C (104° F)
Mercon LV Viscosity: cSt @100°C 6.0 cSt @ 40°C 29.6
Cargo Master
Joined: Nov 2007
Posts: 2,238
Likes: 475
Why the need, or want, for thicker fluid? Are we dealing with a stock pump and related components? Assuming it's for the 2019 f450, Ford
recommends Mercon LV with these specs:
Viscosity:
cSt @100°C 6.0
cSt @ 40°C 29.6
That would make the Royal Purple, @cst 45/9, 50% thicker.
Sometimes hydraulic systems can be finicky. Go too thin on viscosity and you loose pressure because it can't maintain enough of a film around the pump vanes to seal and you can loose force if it also flows through whatever it's trying to move too easily. Go too thick and increase the load on the pump which creates excess heat and slows flow, slowing the motion of whatever it's moving. These things usually happen more towards the extremes of viscosity, I'd assume any of the listed fluids are within an acceptable range range.
If you're trying to get more pressure out of it you'd be better off modifying the relief valve in the pump, or buying a modified pump. I believe stock they are around 600-800 PSI, but can be modded to put out up to about 1200PSI which is the safe limit before it starts blowing seals of of the box
recommends Mercon LV with these specs:
Viscosity:
cSt @100°C 6.0
cSt @ 40°C 29.6
That would make the Royal Purple, @cst 45/9, 50% thicker.
Sometimes hydraulic systems can be finicky. Go too thin on viscosity and you loose pressure because it can't maintain enough of a film around the pump vanes to seal and you can loose force if it also flows through whatever it's trying to move too easily. Go too thick and increase the load on the pump which creates excess heat and slows flow, slowing the motion of whatever it's moving. These things usually happen more towards the extremes of viscosity, I'd assume any of the listed fluids are within an acceptable range range.
If you're trying to get more pressure out of it you'd be better off modifying the relief valve in the pump, or buying a modified pump. I believe stock they are around 600-800 PSI, but can be modded to put out up to about 1200PSI which is the safe limit before it starts blowing seals of of the box
Fleet Mechanic
Joined: Jul 2013
Posts: 1,997
Likes: 237
From: NE Ohio
There is always the lucas stop leak, that stuff is mighty thick. Don't know about running it in a good working system though.
I ran it in my 86 until I could get my pump and box replaced. Of course the fluid spec is different between 86 and 2019
I ran it in my 86 until I could get my pump and box replaced. Of course the fluid spec is different between 86 and 2019
Thread Starter
|
Hotshot
Joined: Jul 2013
Posts: 14,302
Likes: 2,197
Why the need, or want, for thicker fluid? Are we dealing with a stock pump and related components? Assuming it's for the 2019 f450, Ford
recommends Mercon LV with these specs:
Viscosity:
cSt @100°C 6.0
cSt @ 40°C 29.6
That would make the Royal Purple, @cst 45/9, 50% thicker.
Sometimes hydraulic systems can be finicky. Go too thin on viscosity and you loose pressure because it can't maintain enough of a film around the pump vanes to seal and you can loose force if it also flows through whatever it's trying to move too easily. Go too thick and increase the load on the pump which creates excess heat and slows flow, slowing the motion of whatever it's moving. These things usually happen more towards the extremes of viscosity, I'd assume any of the listed fluids are within an acceptable range range.
If you're trying to get more pressure out of it you'd be better off modifying the relief valve in the pump, or buying a modified pump. I believe stock they are around 600-800 PSI, but can be modded to put out up to about 1200PSI which is the safe limit before it starts blowing seals of of the box
recommends Mercon LV with these specs:
Viscosity:
cSt @100°C 6.0
cSt @ 40°C 29.6
That would make the Royal Purple, @cst 45/9, 50% thicker.
Sometimes hydraulic systems can be finicky. Go too thin on viscosity and you loose pressure because it can't maintain enough of a film around the pump vanes to seal and you can loose force if it also flows through whatever it's trying to move too easily. Go too thick and increase the load on the pump which creates excess heat and slows flow, slowing the motion of whatever it's moving. These things usually happen more towards the extremes of viscosity, I'd assume any of the listed fluids are within an acceptable range range.
If you're trying to get more pressure out of it you'd be better off modifying the relief valve in the pump, or buying a modified pump. I believe stock they are around 600-800 PSI, but can be modded to put out up to about 1200PSI which is the safe limit before it starts blowing seals of of the box
thanks for the info
So yes, I know it was LV, but I also know ford went to LV across the board to improve their CAFE MPG rating . they probally gained 1/4 of a MPG by thinning out tranny, transfer case, and PS lube.
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