It's essential and easy to change out your boat motor's oil with the Quicksilver Oil Change Kit for Mercury Sterndrive and Inboard Engines. This kit has been created for use with Mercury MerCruiser and Quicksilver inline 4-cylinder and 6-cylinder engines; MerCruiser V8 5L, 5.7L, and 6.2L boat motors; MerCruiser V6 with remote oil filter; Chris Craft 283, 305, 307, and 350 cu.-in. displacement engines; OMC small block engines made by General Motors (except for engines with the oil filter mounted on remote brackets); and Crusader, Volvo Penta, and PCM small block engines made by General Motors. Contents include oil filter, 6 qts. of Quicksilver FC-W Compatible Certified SAE 25W-40 oil, and instructions. In lab tests, this advanced oil holds its high viscosity ratings longer than other oils on the market. Follow your owner's manual service schedule to keep your engine running at peak performance. Dispose of used oil properly. For Mercury MerCruiser and Quicksilver inline 4-cylinder and 6-cylinder engines Works with MerCruiser V8 5L, 5.7L, and 6.2L engines Also works with MerCruiser V6 with remote oil filter Also works with some General Motors, Chris Craft, and OMC small block Holds its high viscosity longer than other oils