What kind of oil is in r410a?

R-410A refrigerant is typically used with polyolester (POE) oil. This type of oil is preferred because it is compatible with the hydrofluorocarbon (HFC) refrigerants like R-410A, which require synthetic oils for optimal performance. POE oil has good lubrication properties and moisture resistance, making it suitable for use in air conditioning and refrigeration systems that utilize R-410A.