Power steering fluid: semi-synth or full-synth?

Stock_90_TD5_SW · Mar 25, 2019

Dear forum members,

I need to replace the power steering fluid and the workshop manual gives 2 choices, of which I will go for the Cold Climate PAS Fluid 14315 LRN2261.

I have 2 choices of this oil - full-synth and semi-synth. What would You advise, is going full-synth safe for the gaskets and seals in the power steering system? Should I go for full-synth?

THANK YOU!!

Stock_90_TD5_SW · Mar 25, 2019

Ok, guys, sorry for false alarm.. Found this sentence on the Texaco (suggested by manual) liquid spec: Cold Climate Power Steering Fluid is a high performance semi-synthetic power steering fluid.

Semi-synth it will remain

nobber · Mar 25, 2019

Do you live in a cold climate?

Stock_90_TD5_SW · Mar 25, 2019

I live in Estonia. Not that bad, but we have a regular -20 and down to -30 degree celcius every winter for a week or two. I could use any help I can get with making oils more viscous in those weathers. We have summers of +20+25 with rare occasion of +30*C. Do You think that makes it more reasonable to go the other type of fluid called ATF Dexron IID or IIID?

nobber · Mar 25, 2019

It depends, can you get hold of the spec? I think I would spec the oil for cold weather if it were me, the reason being the system could probably handle thin oil better than thick oil.

Stock_90_TD5_SW · Mar 25, 2019

Is this what You mean?

https://cglapps.chevron.com/msdspds/PDSDetailPage.aspx?docDataId=327153&docFormat=PDF

Power steering fluid: semi-synth or full-synth?

Stock_90_TD5_SW

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