AllSyn Max Refrigeration Oil is a synthesized hydrocarbon-alkylate 100% full-synthetic formulation for reciprocating, rotary, and centrifugal refrigeration compressor applications using any of several refrigerants including ammonia (R717), R12, R13, R22, R113, R114, R123, R401A, R401B, R402B, R409A, R500, R502 and R503.