Suniso Refrigerant Oil 3GS is a high performance, direct replacement refrigerant oil and is designed specifically for high efficiency, low temperature refrigeration systems. It is formulated from ultra-pure polyol ester synthetic base oils and high-purity additives that reduce wear and chemical breakdown. This oil provides superior film strength, shear stability, and optimal system efficiency in severe conditions often encountered in commercial refrigeration and HVAC systems. Suniso Refrigerant Oil 3GS is an excellent choice for use with all R-22, R-502, and R-404A/R-507 refrigerants. It meets or exceeds OEM requirements for many refrigeration systems, and has been recognized and certified by leading OEMs.