Refrigeration oil viscosity is given by different methods, Poe-32 and PRO-68 use the same method (ASTM D445) to determine viscosity. The viscosity for POE-32 is 32.5 and the viscosity for PRO-68 and viscosity happens to be 68 and twice the viscosity as POE-32.

These two numbers are tested at 100° and there is another number tested at 212° but isn't something worth taking about. POE-32 would be equivalent to SAE 10W, and PR0-68 would be equivalent to SAE 25W, or right between 20W and 30W and whatever and doesn't matter.

POE oil is miscible with R-22 and backward compatible with mineral oil. There is no concern with residual MO in the system or percentage of mixture of the two oils. Mixture of both oils at any percentage will lubricate and return with the R-22 refrigerant. You can use

Mineral Oils (Copeland 46BWMO, Calumet RO15, Chevron/Texaco Capella WF32, Sonneborn Suniso 3GS, 3GS-P, Savsol 3000, Sonneborn LP200, Savsol LP200, KRP-32, KRW-35)are interchangeable to top off your Copeland compressor. But I don't know if the PRO-68 is miscible or not.

Thank you for taking the time list them.

I am not able to find them on typical on-line shopping channels as a non-HVAC professional. Do you know a product that I can buy online, either mineral oil or POE?

Sorry I don't.

Just adding oil to your system without knowing how much is in it?

If you did that to your car, it wouldn't run right. Would it?

Given that info what would too much oil do to your AC compressor?

To add the proper amount of oil to an R22 Freon system? The cost involved wouldn't be worth it, because first you would need to remove all the oil from the system, then replace that with the proper amount.

Probably the easiest way would be to just replace the compressor. As the new compressor comes with the proper amount of oil as well as the type of oil it needs. But because this is R22 Freon unit, the cost of new refrigerant makes this a losing proposition.

Reusing the old refrigerant with a new compressor? not recommended, due to acidic concerns and possibly killing the new compressor. Why oh why would you spend money on a new compressor and not replace the life blood of the system with virgin refrigerant needed to properly operate it?

DIY? means you fully understand the topic and all caveats to doing what it is you are attempting to do. You must know what to do as well as "what not to do".

DIY does not mean: Run to the internet looking for those who earn money via clicks and notoriety telling you how easy it is.

I service the Katy, Texas area.