It's essential and easy to change out your boat motor oil with the Quicksilver Oil Change Kit for Mercury Sterndrive and Inboard V6 Engines. This kit has been created to work with Mercury MerCruiser V6 engines that don't have the remote oil filter, all Chrysler small-block inboards, and OMC 3.8L and 4.3L General Motor engines. Contents include oil filter, 5 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. For Mercury MerCruiser V6 engines without a remote oil filter Works with all Chrysler small-block inboards Fine for OMC 3.8L and 4.3L General Motor engines Holds its high viscosity longer than other oils