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oil differences

eddiejr on Mon July 03, 2006 12:31 AM User is offline

Just wondering what the difference between PAG oil and Ester oil is?? Why are the two used with 134a? Is one better? Is there negative affects to one over the other, espeially if something were to happen? PROS / CONS??

Also, is mineral oil still available? Where could you get that? (i know it is for R12 as opposed to 134a)

thanks.

k5guy on Mon July 03, 2006 2:20 AM User is offline

We usually use the ester for retrofits. Most of the major auto makers use PAG in systems that are orginal R134a. There are some minor differences, but the main thing is to use the right one for your application. PAG is more likely to be less tolerant of moisture in your system. Mineral oil is still available. Check with ACKITS, I know they have it. But if you put ester in the R12 system, then later you can switch to R134a without a flush.

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eddiejr on Mon July 03, 2006 10:44 AM User is offline

I have heard that 134a sytems get acidic when air and moisture get in the system. Is this because of the 134a or because of the oil? Are R12 systems the same with mineral oil?

k5guy on Mon July 03, 2006 1:28 PM User is offline

I don't think its the oil. http://www.robinair.com/acsolutions/acvacuum/acvacuum.htm

"Moisture in the form of water can cause corrosion after a period of time. However, moisture mixed with refrigerant creates much more corrosion trouble. Refrigerant such as R-12, containing chlorine, will slowly hydrolyze with water and form hydrochloric acids. This acid greatly increases the corrosion of metals and could corrode copper plating."

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eddiejr on Tue July 04, 2006 10:22 AM User is offline

i was just looking on ackits.com and there was a PAG-125 I think that says it is GM approved for an aftermarket lubricant for Harrison compressors. I have a Harrison R4 on my car (1985). Will it be fine too use ester oil because that is what is available locally at the auto store I was at. Could it reduce the life of the compressor?

thanks.

eddiejr on Tue July 04, 2006 10:22 AM User is offline

sorry, double post by accident....don't know how to delete.

Edited: Tue July 04, 2006 at 10:23 AM by eddiejr

Chick on Tue July 04, 2006 10:48 AM User is offlineView users profile

Quote
Originally posted by: eddiejr
i was just looking on ackits.com and there was a PAG-125 I think that says it is GM approved for an aftermarket lubricant for Harrison compressors. I have a Harrison R4 on my car (1985). Will it be fine too use ester oil because that is what is available locally at the auto store I was at. Could it reduce the life of the compressor?



thanks.

On R4's and A6's use only PAG 150 is using PAG, but you can use ester 100 if you wish

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Chick
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eddiejr on Tue July 04, 2006 11:55 AM User is offline

ok cool, thanks.

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