Here's why:
* Different Lubrication Needs: 4-stroke engines rely on a separate oil sump and a lubrication system designed to deliver oil to moving parts under pressure. 2-stroke oil is formulated to mix with fuel and lubricate the engine directly.
* Additives: 2-stroke oil contains additives designed to burn off in the combustion process. These additives can leave harmful deposits in a 4-stroke engine's critical components, such as the piston rings, valves, and catalytic converter.
* Oil Viscosity: 2-stroke oil is typically thinner than 4-stroke oil, making it unsuitable for the higher pressures and demands of a 4-stroke engine.
* Engine Damage: Using 2-stroke oil in a 4-stroke engine can lead to serious engine damage, including:
* Clogging of oil passages: This can cause engine oil starvation and lead to catastrophic failure.
* Premature wear: The thin viscosity and additives in 2-stroke oil can lead to excessive wear on engine components.
* Damage to the catalytic converter: The additives in 2-stroke oil can damage or clog the catalytic converter.
Always use the oil specifically recommended by the manufacturer for your 4-stroke engine. You can find this information in your owner's manual or by contacting the manufacturer.