The Trane OIL00031 1-Gallon Refrigeration Oil is a specialized lubricant designed for compatible Trane refrigeration and HVAC compressor systems. It lubricates internal moving components, helping minimize friction, reduce wear, and support efficient compressor operation. Suitable for compatible air conditioning units, commercial refrigeration systems, and other specified cooling equip... https://www.partshnc.com/oil00031-trane-compressor-oil-300-sus-1-gallon