YAMAHA Yamalube 2M TC-W3 2 Stroke Conventional Marine Engine Oil Yamalube 2M TC-W3 2 Stroke Conventional Marine Engine Oil, Quart. Yamalube TC-W3 2-Cycle Engine Oil delivers superior lubrication for outboard engines operating in demanding marine environments.Developed for autolube oil injection systems used on all 2-cycle air and liquid cooled gasoline engines, Yamalube helps to optimize performance during extended full-throttle operation, out-of-the-hole" acceleration or during hours of slow trolling. NMMA TC-W3 -certified, Yamalube delivers superior lubrication and anti-wear/anti-rust protection for outboard engines operating in demanding marine environments. Not recommended for WaveRunner personal watercraft or Sport Boats.