Question: what is the difference between 4 cycle engine oil and motor oil?
Answer: Difference Between 4-Cycle and 2-Cycle Oil. ... As far as the user is concerned, the difference is that you add oil directly to the gas of your 2-cycle tool, while you pour oil into a separate port with a 4-cycle engine. Because it burns with the fuel, 2-cycle oil is lighter and contains additives for better combustion.