The purpose of compressor oil is to lubricate and cool the moving parts of the compressor. The oil film also protects the rubber seals in refrigerant lines and connections, reducing the amount of refrigerant leaking out.
Compressor Oil Four Seasons 59002
Case of 4 Bottles (8oz) Four Seasons 59002 PAG 100 Oil for R134 (B195)
Four Seasons 59889 Refrigerant Oil for YN32 ND11 MT30321 MT3032 8011275 nx
Four Seasons 69083 Refrigerant Oil for RO9947 488150P 4150070 09962 vc