The Trane OIL0048 is a 1-gallon polyol ester (POE) lubricant with ISO 68 viscosity, formulated for use in modern refrigeration and air conditioning systems. It works by providing effective lubrication to compressor components, reducing friction, wear, and heat during operation. Commonly used in HVAC compressors, chillers, and refrigeration units compatible with synthetic refrigerants, it ensures smooth and efficient performance.