I'm recharging my 134a system this weekend and I have a few last minute questions. First some info on my car's a/c. The compressor, liquid line, and accumulator are being replace, plus new o-rings. The system is receiving 3 cans of 134a arctic freeze(almost 3 cans, each can has 12oz). Each can has 1 oz of lubricant mixed in, so will I need more pag oil? The new compressor has black o-rings (which an ac tech told me would be fine with the 134 freon); will there be oil in the compressor already? will draining the compressor be needed to add PAG oil?(I ask this because I'm concerned the oil the compressor maybe r12 based. I told the seller I had 134a system but the compress arrived with black o-rings) Basically after I evac the system I just start adding 134a or do I add more oil ?
thanks
thanks