Check the listing for details. OilCharge A/C Universal Refrigeration Oil (4 oz. can). Condition: New. Listed at 23.95 USD. RED TEK® OilCharge™, an air conditioning synthetic refrigeration oil from Thermofluid Technologies, is a formulated lubricant designed to be compatible with R12 and R134a lubricants. BENEFITS Operation: Easy to use. Installs in minutes. Can be used with R134a or R12. Lower Cost: Refrigerant oils do not have to be changed or replaced. Compatibility: Compatible with most common refrigeration materials and lubricants including R134a, R12, R22, R502, metal components, mineral and synthetic PAG lubricants, seals, gaskets, hoses, compressors, and o-rings. Environment: Helps environment by reducing oil changes and extending equipment life. Safety: Safe and easy to use. RED TEK Pure Zero Patent Pending Technology is a natural, high-efficiency ultra-refined HC gas specifically formulated for use in refrigeration and air conditioning systems. Pure Zero is a Refrigerant Grade Gas made from UL Certified HC gases. Its ultra-refined technology greatly increases efficiency, performance, and reliability.RED TEK PureZero is designed to extend compressor life compared to other lesser refined HC gases that contain impurities not designed for use in air conditioning and refrigeration systems.Some of the largest manufacturers of refrigeration systems have made the switch to RED TEK PUREZERO! ***SHIPPING IN 48 STATES ONLY (NO SHIPPING TO HAWAII, ALASKA, OR CANADA) - NO INTERNATIONAL SHIPPING***