Unparalleled oil filtering protection for your Mercury or Mariner Four Stroke outboard engine. Fits Mercury and Mariner 25 hp Four Stroke carbureted engines (model year 2006 and prior). Fits Mercury and Mariner 30 hp, 3 cylinder Four Stroke engines (model year 2005 and prior). Fits all Mercury and Mariner 4060 hp Four Stroke outboards (model year 1998 and newer). Fits all Mercury and Mariner 75115 hp Four Stroke outboards (USA serial number 1B366822 & prior). Fits all Mercury and Mariner 75115 hp Four Stroke outboards (USA serial number 2B094996 and above). The Quicksilver brand is the leader in delivering uncompromising engine oils, parts and accessories to the marine industry for over 65 years. Quicksilver is the premier supplier of Mercury Marine Original Equipment replacement engine parts, oils, and accessories, but also works to serve all Original Equipment brands in the marine and powersports industries. It has earned a loyal following by providing the highest quality products that are tested through some of the most rigorous environments and testing procedures. No aftermarket company comes close to the level of research and design as Quicksilver; buying Quicksilver is buying performance, protection and peace of mind.