Sierra TC-W3 premium blend 2-cycle engine oil. TC-W3 is a high performance lubricant that has been manufactured and designed to meet and exceed all engine manufacturers' warranties. Exceeds JASO, ISO, API, and NMMA for advanced generation 2-cycle lubricants. Ideal for oil injection systems. Reduces aquatic toxicity to fish. Less friction for easier starting. Improves and extends engine life by reducing wear on components. 16 gallons. Sierra Part #18-9500-6.