What kind of lubricating oil should be added to the motor?

[VonIvan]

Generally speaking, the motor of a car does not require lubricating oil, but the motor bearings may need grease. Below is some relevant knowledge about car motors: Performance requirements of car motors: The characteristics of car driving include frequent starting, acceleration, deceleration, and stopping. High torque is required at low speeds or when climbing hills, while low torque is needed at high speeds. The motor's speed range should meet the requirements from zero to the maximum driving speed of the car, meaning the motor must have high specific power and power density. Working principle of car motors: The motor is the component that converts the battery's electrical energy into mechanical energy to drive the rotation of the electric vehicle's wheels.