Suitable for Outboard Motors, TCW-3 approved.An exclusive additive blend works to guard against power robbing ring stick, and carbon build up, while special additives minimise wear. This oil has been designed for the most gruelling conditions your outboard faces. Whether it’s extended full-throttle operation, or engine pushing “out of the hole” acceleration, or even hour after hour of trolling, this oil stands up to the test. The special additives we have formulated for Yamalube 2M also combine to offer the best rust and corrosion protection we could find.