Sierra TC-W3 synthetic blend oil. This high performance lubricant has been manufactured and designed to meet and exceed all manufacturers' warranties. Ideal for oil injection systems or pre-mix applications. Significantly reduces aquatic toxicity to fish. Also reduces ring sticking, deposit formation, and exhaust port blockage. Less friction will then allow easier starting. For direct injection applications. Includes 84 2.5-gallon containers of oil. Sierra Part #18-9500-4P.