Deliso 4GS and Deliso 4SA are premium naphthenic oils designed for lubricating refrigeration compressors using conventional refrigerants (FREON R12, R22, R11, R113, R13B1, and R502), as well as ammonia and CO₂. These oils are highly stable and virtually wax-free. Both products have a long history of satisfactory performance in a wide range of equipment and are approved by most manufacturers for both factory fill and service fill. Deliso 4GS is suitable for use in almost any installation, regardless of compressor or evaporator temperatures. It is particularly suitable for low-temperature systems with evaporator temperatures below −18°C, including domestic and commercial refrigeration and air-conditioning systems.