Abstract: A motor with an oil seal. The oil seal includes a first storage wall disposed in a position corresponding to a recess of a shaft. The oil seal receives lubricant and prevents leakage of the lubricant, enhancing self-lubrication of the motor. A bottom storage tank with a specific sloped surface is provided in the motor. During rotation of the shaft, the bottom storage tank increases usage of the lubricant, thereby enhancing self-lubrication of the motor.