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Where's the AC oil? S90-V90

posted by  david hunter on  Fri Feb 28 13:37 CST 2003
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last visit: Mon Jun 30 22:10 CST 2014
[RELATED]

Chris, I am researching a bit on oils and as far as I can tell your comments are correct concerning oils. Here is what i have learned.

Ester oil if for converted systems because it mixes and is compatible with the remnants of the mineral oil.

PAG is used in factory filled R134 systems, there are 2 viscosities depending on the compressor used:
spec ISO150 which is high viscosity for GM and possibly some others
spec ISO 46 which is low viscosity and is used in a long list of compressors including Sanden York Chrysler CCI Nisson Ford and more.

I have not yet been able to find out what our Volvos use but I think it is the low viscosity. When I recharge my S90 I will be adding a small amount of this.

BTW I did discover a small amount of oil hiding in the recesses of the receiver dryer which would not actually drain out but I can see and feel it in there with my baby finger. This is after it sits upside doen for a while. I am going to drill a small hole in the bottom to see how much is there. Perhaps I am being a bit anal with this but that's the way I do things.
--
David Hunter






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