NMMA TC-W3-Certified, 2M premium two stroke blend delivers superior lubrication and anti-wear/anti-rust protection for outboard engines operating in demanding marine environments. Provides the highest level of protection on the market. Semi-synthetic oil with an exclusive additive blend works to guard against ring stick and carbon build up, while special additives minimize wear. This oil is designed for the most grueling conditions two stroke outboards face. Whether it’s extended full-throttle operation, engine- punishing “out of the hole” acceleration, or hour after hour of trolling, this oil can take it. With its extreme level of performance, Yamalube 2M offers the best everyday protection, too. Not recommended for WaveRunner Personal Watercraft or Sport Boats.