Koyoto series is designed with synthetic base stocks and an advanced technology additive system to provide a very high level of engine protection and performance. It is suitable for higher mileage gasoline and diesel-fueled automobiles and light-duty trucks requiring an API SM/CF specification, where very high viscosity index oils are preferred to provide longer oil drain intervals in modern engines. It provides maximum protection in engines operating under severe conditions, including high-performance turbo-charged, supercharged gasoline, and certain diesel multi-valve fuel-injected systems.