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#1
05-02-2015, 02:53 AM
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A/C O-ring lube
The service manual says to lube A/C o-rings and threads with 525 viscosity mineral oil. It specifically says to not use PAG oil.
I can order 525 mineral oil through Buick for $21 (amount unknown - probably a quart - way more than needed). NAPA has 500 viscosity mineral oil for $10/quart. The label says for R-12 systems and lists Grand Prix through 94. Is that oil acceptable for a R-134a system? Are there any other lubricants that can be used?
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Lloyd 18 Charger ScatPack 392 18 Lincoln Navigator L (Hers) 98 Grand Prix GTP Sedan (RIP) 99 Grand Prix GTP Coupe (to the moon) 05 Wrangler Unlimited (Junior's) 03 Explorer XLT (Sissy's) 
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#2
05-02-2015, 07:24 AM
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Re: A/C O-ring lube
Never used it, but someone told me about it....can't see buying a quart of mineral oil.....
http://www.acsource.com/nylogsealantpnrt201bblue.aspx
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DrRadar (05-02-2015)
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#4
05-09-2015, 04:55 PM
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Re: A/C O-ring lube
Gonna use R-12 refrigerant oil that I already have to lube o-rings. Bottle doesn't identify it as "mineral oil" but I've seen R-12 oil online identified as mineral oil. I'm thinking should be fine just to lube o-rings.
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Lloyd 18 Charger ScatPack 392 18 Lincoln Navigator L (Hers) 98 Grand Prix GTP Sedan (RIP) 99 Grand Prix GTP Coupe (to the moon) 05 Wrangler Unlimited (Junior's) 03 Explorer XLT (Sissy's)
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