WITH ROC Oil there's no waste due to moisture TOP UP OR FILL UP - compatible-in any ratio-with all lubricants ZERO MOISTURE ABSORPTION - both PAG and ester lubricants can absorb up to 50% of their weight in water that could end up in the a/c system TENACITY - because of its low miscibility, more lubrication stays in the compressor and less travels with the refrigerant, reducing the chance of starving the compressor of lubrication - especially in the event of refrigerant loss A/C SYSTEMS WITH ROC OIL ARE MORE EFFICIENT Quick 'pull down' times and lower vent temperatures Reduced compressor load and run times Improved compressor durability - less noise CLIPLIGHT ROC OIL IS A highly refined synthetic lubricant with an operating range of -90 F to 599 F that will not break down over extended use. Part #51105