Inline oil filter 875284T01 is for use in Mercury 2.5L and 3.0 L OptiMax outboards (non-pro models, serial No. 1B227000 and above). Refer to your owner's or service manual for replacement intervals through out the year. Change your oil and oil filter to help maintain peak performance from your engine. Use only Mercury/Quicksilver oil in your Mercury outboard. 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.