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Old 11-12-2003, 03:57 PM
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Join Date: Aug 2003
Location: San Juan, PR-USA
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Question Oil for R12

Hi Board and friends. I am returning to R12 on my 350SD-1991. What oil should I use in a Nippondenso 10PA17C with R12 freon? I know PAG-46 is recommended with R-134, but I need to know if I should use some specific mineral oil, or if there is something better. Thanks in Advance.

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Old 11-12-2003, 05:23 PM
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Join Date: May 2002
Location: Mass
Posts: 1,127
Certainly not PAG.

Pretty sure these all took mineral oil.

You're going to have to do a full flush if you are reverting to r12.

Some folks suggest switching to POE oil after a full flush, but I have no experience with it.
1986 300E 5-Speed 240k mi.

Last edited by csnow; 11-12-2003 at 07:28 PM.
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Old 11-12-2003, 06:20 PM
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Join Date: Aug 2003
Location: San Juan, PR-USA
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Thank you Csnow

I hope that the mineral oil have some kind of compatibility with the previous oil used in my system, because I was told that the compressor can not be flushed, only drained and I wonder how many days I have to leave it hanging to drain all the remaining oil. Thank you for the answer, I am planning to do a full flush of everything I can flush. There is a hose with a muffler or something that I can't, but the other hoses, the evaporator and the condenser will be flushed. Thank you again.


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