Toyota Genuine Oil WS is a premium automatic transmission fluid (ATF) engineered specifically for Toyota and Lexus vehicles. This high-performance fluid is formulated to provide optimal transmission efficiency and smooth shifting, ensuring your vehicle operates at its best. The Toyota WS formulation delivers excellent low-temperature fluidity and high-temperature stability, preventing transmission wear and enhancing longevity. It also improves fuel efficiency and ensures a smooth, quiet driving experience by reducing friction within the transmission.