Yamalube Marine Performance 2-Stroke Marine Oil The Yamalube is a certified 2 stroke oil engine blend that delivers superb lubrication with excellent anti-wear and rust protection for outboard engines. Exclusive additives guard against power-robbing ring stick and carbon build-up. Yamahas Yamalube oil is built around the unique demands, operating characteristics, and applications of Yamaha outboards. Whether its extended full-throttle operation, engine-punishing out-of-the-hole acceleration, or