With the widespread introduction of the four-stroke outboard engine technology, NMMA considered it necessary to develop a marine engine oil category specifically for marine four-stroke engines. With all of the major outboard engine manufacturers producing four-stroke outboards to further reduce emissions and increase fuel economy, the need for oil specifically designed for the unique marine environment became necessary.

Industry leaders in lubrication developed testing criteria for this marine four-stroke oil. These include bench tests for viscosity, corrosion, filter plugging, foaming and aeration. In addition, the oil must successfully pass a 100-hour general performance engine test.

Once these oils have been tested by a sanctioned test laboratory, NMMA will issue licenses for the oil's formulation and registers approved brands.

FC-W™ lubricants have demonstrated the necessary performance and quality needed need in today's high performance four-stroke engines. The next time you are purchasing four-stroke oil for your marine engine, look for the FC-W™ trademark.

View the 2005 FC-W® Registered Four-stroke-cycle Marine Oils List

View the 2004 FC-W® Registered Four-stroke-cycle Marine Oils List

FC-W Certification Procedure Manual (Size: 516 kB)

FC-W Product Approval System (Size: 83 kB)

For more information regarding oil certification, contact Tom Marhevko at 312-946-6213 or tmarhevko@nmma.org