Brand new A6 Compressor received with wrong oil type, what to do?

[jllgd]

I’ve just purchased a brand new GM ACDelco type A6 compressor, manufactured by company Alma Products.
Compressor is all correct, but it’s unfortunately filled with PAG 150 oil, not mineral oil.
I need a compressor filled with type 525 mineral oil, due to using R12 Freon in the AC system.

Can I simply drain and flush the PAG oil from the compressor, and refill with 525 mineral oil?
Or are there O rings and rubber seals etc. inside this compressor that will be affected?

Should I rather return the compressor?

Would there perhaps be a good procedure available for such an oil change?
Attaching a couple of pics of the ac compressor.
Thanks

[Tom Greenleaf]

TMK the A6 was in use long before anything but R-12 was used in "mobile" vehicles. So it's a pump that also could tolerate inferior 134a. I guess I would ask the maker so warranty stays in effect expect you are set to use mineral as it would have been OE in whatever it's going in.

So yes would dump out PAG and flush thru mineral and still cross fingers there's nothing wrong with this.

Notes: R-12, Freon by Dupont (argue all you want) is the gold standard for condensable gasses, wider range lower pressures and a caloric value of 1.

134a is about 80-85% as capable requires the PAGs or Ester so oil circulates.

The R-12 is a larger molecule less apt to leak does not require barrier hose and "O" rings would now be overkill so great.

Don't waste your R-12 still in use by me and no doubt many it works best, leaks least both molecule and operates at lower pressures so charge this carefully when you can control temps around it/whole vehicle really helps. IDK if any machines are still working that would meter in and take out this gas anymore it's become rare but still have one OE vehicle with it and real R-12 not all Dupont's Freon but is real, new R-12. Good luck sport it's worth it :-)

[Cusser]

Some shops in Phoenix AZ still service R-12 systems.

[muscle spasm]

Call Alma the compressor manufacturer. Ask them what they recommend to keep any warranty. Maybe they have another with mineral oil?

[Cusser]

Compressor is all correct, but it’s unfortunately filled with PAG 150 oil, not mineral oil.
I need a compressor filled with type 525 mineral oil, due to using R12 Freon in the AC system.

Can I simply drain and flush the PAG oil from the compressor, and refill with 525 mineral oil?
Or are there O rings and rubber seals etc. inside this compressor that will be affected?

Should I rather return the compressor?

Would there perhaps be a good procedure available for such an oil change?

Years ago, I bought a compressor from this site's sponsor (Tim/AMA) for my 1988 Mazda B2200 truck (keeping R-12), picked up the compressor locally at the AMA shop in west Phoenix. I was heading up the Analytical Chemistry lab at Dial soap/detergent R&D, and I took a few drops of oil from the compressor in to the lab, and a 5-minute test (infrared spectroscopy, FTIR) identified it as a PAG oil.

So I drained out the PAG oil, added about 6 oz. 525 mineral oil, and rotated the compressor drive plate about 10 times, then dumped/discarded that. Then I repeated that process with an additional 6 oz. 525 mineral oil. Only then did I add correct amount of 525 mineral oil and install the compressor.

Funny thing is that 2 months later my co-worker bought same brand of compressor for his 1990 Mazda Protege from Tim/AMA (also keeping R-12), and we tested the oil in his new compressor, and his compressor contained 525 mineral oil. Go figure !!!

[bbrickson]

There is no problem running R12 and Pag oil. There also would be no problem measuring what you drain and replacing it with mineral oil. No need to flush, they do not react and either works.

[Tom Greenleaf]

Use the oil suggested mineral oil does not circulate without R-12 PAG oils do and must or you'll ruin compressor.

Ester oil is the "go between" if changing/retrofitting a system mixes with both.

New compressors come with PAG if not intended dump it out in fact do it anyway measure in what it should be with correct oil for the situation. PAG oils are hygroscopic mineral is not HUGE problems down the road as that also makes it acidic system would self-destruct!