A friend of mine got into a discussion about motor vs. engine. He seems to think the two are interchangeable while I do believe there is a fundamental difference. It's similar to the clips vs. magazines debate for firearms owners. I use motor to describe electric devices (blower motor, windshield wiper motor, window motor) and engine to describe what's under the hood powering the vehicle. Engines convert fuel via internal combustion to work to move the vehicle. Motors use electric current as the energy source to do work. Hybrid vehicles have an electric motor and an internal combustion engine. Any thoughts.