Original Yamaha 2-stroke semi-synthetic oil helps protect against ring stick, corrosion, & wear in water-cooled 2 cycle outboard marine engines. Yamaha Yamalube 2M outboard engine oil Meets or exceeds NMMA TC-W3 standards Semi-synthetic formula contains a special blend of additives to provide unmatched lubrication and anti-rust protection Provides the highest level of protection of any TC-W3 on the market Formulated to protect from the most grueling conditions and environments two stroke outboards face Not recommended for WaveRunner, personal watercraft or sport boats 32 oz.