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paraffin oil and mineral oil

jga2z on Mon May 16, 2011 9:43 PM User is offline

Year: 1993
Make: Ford
Model: F250
Engine Size: 7.3
Refrigerant Type: r12
Country of Origin: United States

I can't believe that a search for "paraffin oil" used in 1993 older R12 Fords returned 0 results.
Hence my posting. I am fixing this empty 93 F250 system (44oz system) and have 2 options. I only have 2 cans of R12 left
1: direct transfer (thru gauges) r12 from a junk 93 Mercedes (fully charged system 35oz) with mineral oil to the 93 F250 with paraffin oil. Are the 2 types of oil totally incompatibile if possibly mixed? If I very slowly let the Mercedes r12 out I should be able to keep any oil from transferring.
2: Change receiver dryer to a r134a type and use r134a to recharge.

What is the story on the paraffin oil?

Edited: Mon May 16, 2011 at 11:05 PM by jga2z

Cussboy on Tue May 17, 2011 12:57 AM User is offline

Paraffin oil and mineral oil are straight chain primary alkanes. I'm not sure if there is any real difference, in the chemistry world. Now, if you're talking about refrigeration oil for an R-12 system, use genuine refrigeration oil detailed for R-12. See this board sponsor.

jga2z on Tue May 17, 2011 12:33 PM User is offline

I have a quart of R12 refrigeration oil that I've had for almost 20 years, still half full.
The reason I asked about paraffin oil (which I had not heard of) is that's what type was shown for all old R12 Ford's on the "ACspeclisting.pdf" file I found. I didn't want a problem with possible mixing of the oil from the Mercedes into the Ford.
Also I hate to scrap the Mercedes with a complete AC system in it.

Edited: Tue May 17, 2011 at 12:40 PM by jga2z

ice-n-tropics on Tue May 17, 2011 5:00 PM User is offline

Rest easy, friend.
Harrison/Delco compressors for GM R-12 always used Parifinac based mineral oil from BVA.
Denso and Ford (Denso licensed) compressors always used Napthenic based mineral oil for R-12 as did the Visteon FX comps.
Don't know the oil base of Ford comps made by York, but I bet Ford specified Napthenic based min. oil for service commonality.
I ran durability comp tests w/ 50% napthenic and 50% parafinic based mix with ZERO problem. They are 100% compatable and were aproved by GM in the past for scroll comps. on Trailblaizers, etc.
The scroll guy, hotrodac

Isentropic Efficiency=Ratio of Theoretical Compression Energy/Actual Energy. How To Air Condition Your Hot Rod

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