Quicksilver Outboard Motor Oils help protect your investment by reducing friction, improving performance, and protecting against engine wear and internal corrosion. Premium Plus 2-Stroke TC-W3 Motor Oils Specifically formulated to meet the unique needs of high horsepower outboard engines, under general marine operating conditions. 4-Stroke Motor Oils Maintain peak engine performance and reliability; and eliminate thermal breakdown under extreme rpm, temperatures, and loads. Can be used in any marine engine equipped with or without a catalytic converter. Recommended by Mercury Marine. Cancer and Reproductive Harm- www.P65Warnings.ca.gov.