Your 1st post asked about lubing a compressor. The compressor clutch is press fit onto the compressor shaft. Need special tools to do it. No lubing there. As for internally, compressor oil (PAG oil) flow throughout the AC system along with refrigerant. Generally compressors when new come with 300 CCs of oil in them. when you replace individual components separately you're to add oil (evaporator, condensor, receiver drier/accumulator, etc.) But you'd need low side service port fitting to add oil. NEVER NEVER NEVER charge to the high side. Always service the low side.