Koyoto SL series is designed with high-quality semi-synthetic base stocks and an advanced technology additive system to provide very high level of engine protection and performance. It is suitable for higher mileage gasoline-fueled automobiles and light-duty trucks requiring an API SL specification, where very high viscosity index oils are preferred to provide longer oil drain intervals in modern engines and better oil consumption control in older vehicles where oil usage (burning) is an issue.