Why must a technician use proper oil when servicing and lubricating a motor?

Using the proper oil when servicing and lubricating a motor is essential because it ensures optimal performance, efficiency, and longevity of the motor. Different oils have specific viscosity ratings and additive compositions that are tailored to the operational requirements of various motors. Using the wrong oil can lead to inadequate lubrication, increased friction, overheating, and ultimately, motor failure. Additionally, proper oil helps to prevent corrosion and wear, maintaining the integrity of the motor components.