hello friend excuse me what happens is that when I go to repair a leak in the equipment I realized that the oil was completely black, the compressor works fine but I would like to change the oil and good on the internet and in fact it tells me that the oil is poe but there are several definitions of 32 and 68, I would like to know which one is leading to avoid damaging the compressor by one saying it is for 134a and the other says it is for r22. that's my doubt ... if you could help me on that I would appreciate it