Engineered specifically for washing machines, this system utilizes a patented liquid level following mechanism to ensure high-speed, reliable surface oil collection even during fluid fluctuations. It combines a sealless screw pump—which eliminates common swarf suction troubles and provides dry running resistance via a non-shaft-seal mechanism—with an oil separator that contains zero consumable parts, greatly minimizing routine maintenance. Additionally, the pump mechanism is uniquely designed to avoid stirring oil and water together to optimize separation performance, and the entire oil separator can be easily disassembled for cleaning without requiring any tools.