TSI Supercool 24766 HVAC POE 68 Premium Synthetic Polyester Oil - 1 Gallon Premium synthetic polyester oil Extends compressor life Compatible with HFC and HCFC refrigerants Can be used with R134a, R12, R22, R401b, R401c, R404a, R404c, R407c, R409a, R409b, R413a, R500, R507a