When should you change your small engine's oil? Before the engine has reached operating temperature. After the engine has reached operating temperature. Either of the above None of the above

The correct answer is: After the engine has reached operating temperature.<br /><br />Explanation: It is generally recommended to change the oil in a small engine after it has reached its operating temperature. This ensures that the oil has had a chance to circulate and lubricate the engine components properly. Changing the oil while the engine is cold can result in incomplete lubrication and potential damage to the engine. Therefore, the correct answer is 'After the engine has reached operating temperature.'