What are two ways to lubricate ac compressor?

Two common ways to lubricate an AC compressor are by using the manufacturer's recommended oil type, which can be injected directly into the compressor through the service ports, or by ensuring that the refrigerant used in the system contains the appropriate oil mix. Regular maintenance, including checking for oil levels and leaks, also helps ensure proper lubrication. It's crucial to follow the manufacturer's guidelines to avoid damage to the compressor.