High Performance four stroke marine engine oil is recommended for use in Mercury Verado and other high performance marine engines. It is SAE 25-W50 weight oil. Provides outstanding wear and corrosion protection to help extend engine life. Meets or exceeds all marine engine manufacturer's warranty requirements and recommendations for use of an FC-W marine engine oil. It maintains its viscosity, protects against varnish buildup and sludge formation and exceeds the rust protection requirements for NMMA certification. This package is a one quart bottle. See your owner's manual or service manual for specific applications and instructions.