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 many of the major outboard engine manufacturers producing four-stroke outboards to reduce emissions and increase fuel economy, the need for oil specifically designed for the unique marine environment became necessary.

Working with the NMMA, industry leaders in lubrication technology developed testing criteria for this marine four-stroke oil. These criteria 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 an oil has been tested by a sanctioned test laboratory, NMMA issues a license for the oil’s formulation and registers approved brands.

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

2023 FC-W® Registered Four-Stroke-Cycle Marine Oils

Number Name Company
FB-00511J Yamalube Marine Performance 4M Four Stroke FC-W 10W-30 Yamaha Motor Corporation
FB-00512J Yamalube Marine Performance 4M Four Stroke FC-W 20W-40 Yamaha Motor Corporation
FB-00616J Lubrax Nautica Tecno SAE 25W-40/Petrobras Distribuidora Vibra Energia S.A.
FB-00620K Yamalube 5W30 Full Syn Marine FCW Yamaha Motor Corporation
FB-13721U 4 TEMPS FCW 10W-30 Minerva Oil SAS
FB-14301X ADDINOL Aquapower Outboard 4T 1030 ADDINOL Lube Oil GmbH
FB-20333H Prosurf 4T FC-W, SAE 10W-40 IGOL France
FB-20444H Prosurf 4T FC-w, SAE 10W-30 IGOL France
FB-20555H Prosurf 4T FC-W, SAE 25W-40 IGOL France
FB-31001B Tohatsu Premium Four-Stroke Oil Tohatsu America Corp.
FB-37565U KPO Jetski Watercraft 10w-40 Kawasaki Motors Corp., U.S.A.
FB-40003A Ravenol Outboardoel 4T Ravensberger Schmierstoffvertrieb GmbH
FB-43547X ADDINOL Aquapower Outboard 4T 1040 ADDINOL Lube Oil GmbH
FB-80460T Yamalube Marine Performance FC-W 10W-30 Yamaha Motor Distribution Latin America Inc.
FB-83138K RAVENOL OUTBOARDOEL 4T SAE 15W-40 Ravensberger Schmierstoffvertrieb GmbH

For more information regarding oil certification, contact:

Scott Berry
Director of Engineering Standards