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Air Condirtioning OIls for R134a 200

posted by  jdsullivan on  Tue Sep 20 13:46 CST 2005
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last visit: Fri Jun 22 13:20 CST 2012
[RELATED]

I've been researching which oil to use when I get around to reinstalling my AC components, all of which have been used with 134a only. I understand that POE oil will work fine with R-134. I understand that PAG oil of the right viscosity will also work, and that the new, "double-ended" PAG oils are only minimally hygroscopic. "Single-ended" PAGs seem to both hold and hate water, as well as any other impurities, such as residual mineral oils in retro-fitted systems.

Given PAG's evidently finicky nature -- whether or not it is now tamed -- here is my question: What ADVANTAGE do PAG oils have over POEs? There must be some reason that manufacturers, including Volvo, use PAG as the factory lube in 134a systems, but I haven't been able to find out what it is.

Thanks for any light you can shed.
--
jds








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    Air Condirtioning OIls for R134a 200

    posted by  Sumerduckman on  Wed Sep 21 09:39 CST 2005
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    last visit: Tue Aug 21 11:31 CST 2007
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    Check out this discussion at the ackits.com forums http://www.autoacforum.com/messageview.cfm?catid=2&threadid=11190&FTVAR_MSGDBTABLE=
    --
    Gary Gilliam Sumerduck VA, '94 940 na Regina 160k '86 240 190k








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      Air Condirtioning OIls for R134a 200

      posted by  jdsullivan on  Wed Sep 21 14:48 CST 2005
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      last visit: Fri Jun 22 13:20 CST 2012
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      Thanks, Summerduckman,

      I checked it out. Not sure which of its dueling experts to believe, especially as some of them are selling the product they tout, but the arguments were interesting.
      --
      jds







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