This is a high quality semi-synthetic in/outboard motor oil that is specifically developed for marine applications that need the NMMA FC-W specification (e.g. Mercury Marine, Yamaha). This product has a very good oxidation and corrosion protection and ensures long equipment lifetime. This product can be used in “sterndrive & inboard” applications. It is also applicable for the more traditional 4-stroke outboard engines. These products are also very well suitable for salt water marine applications.