The Zexel compressors on P2 use PAG 46 oil (Volvo part no. 1161 627-3).
Yes, the oil covers the surface so can't be drained from components so you just add oil volume by replaced components (VIDA figures):
Reciever drier : 30cm3
Evaporator: 50cm3
Condenser: 30cm3
Tube: 10cm3
Hose: 10cm3
Oil likes to trap air moisture so should be added as late as possible but before vacuuming the system, unless a pro pumping station is used. Always keep the open ends of the system covered when replacing components.
If you plan to get it filled by a workshop then let them do the oil adding so it doesn't get moisture contaminated, just let them know about the volume needed by replaced parts (drier+condenser = 30+30 = 60cm3 of PAG 46).
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2002 V70 D5
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