The engine oil seal is a critical sealing component in the power system. Its main function is to establish a stable sealing interface between the rotating shaft and the engine housing, effectively preventing lubricant leakage, isolating external contaminants, and ensuring the engine operates stably over the long term under various conditions. Compared with ordinary seals, high-end engine oil seals need to maintain reliable sealing performance under high temperature, high speed, pressure fluctuations, and complex lubricating medium environments, which places higher demands on material selection and lip design.