* Incorrect Viscosity: 20W oil is designed for four-stroke engines and has a much thicker viscosity compared to the recommended oil for two-stroke engines. This thick oil will not mix properly with the fuel, leading to improper lubrication and potential engine damage.
* Pre-Mixing Issues: Two-stroke engines require a specific oil-to-fuel ratio for lubrication. 20W oil will not mix effectively with gasoline, leading to an uneven mixture and potential engine seizure.
* Clogging: The thicker viscosity can clog the engine's oil passages and fuel lines, restricting oil flow and causing problems with lubrication and fuel delivery.
* Smoke and Emissions: The incorrect oil mix can lead to excessive smoke and emissions, impacting engine performance and potentially causing environmental damage.
* Engine Wear: Without proper lubrication, your engine will suffer from increased wear and tear, leading to premature failure.
What to do instead:
* Use the Recommended Oil: Always refer to your Yamaha RXS100 owner's manual for the recommended oil type and ratio.
* Choose a Two-Stroke Specific Oil: Yamaha recommends using a high-quality, two-stroke oil formulated for air-cooled engines.
* Follow Mixing Instructions: Strictly follow the oil-to-fuel ratio specified in your manual. Over-mixing can cause problems, while under-mixing can lead to engine damage.
In conclusion, using 20W oil in your Yamaha RXS100 will likely cause more harm than good. Always use the correct oil type and ratio to ensure proper engine lubrication and performance.
