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.

2024 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-050556A YAMALUBE 4T Eduardono S.A.S.
FB-097565B Repsol SAILOR Gasoline Board 4T Repsol Lubricantes Y Especialidades S.A.
FB-130450Y Sierra Synthetic Blend 25W-50 Sierra International
FB-13721U 4 TEMPS FCW 10W-30 Minerva Oil SAS
FB-13724U ECSTAR V7000 Semi-Synthetic Marine Engine Oil Suzuki Motor Corporation
FB-13800W Motul Marine Tech 4T 25w-40 MOTUL SA
FB-13811W Marine Outboard Four Stroke Oil 10w-40 Penrite Oil Company Pty Ltd
FB-14307W Marine Performance 20W-40 Yamaha Motor Canada Ltd.
FB-14800W Motul Outboard Tech 4T 10w-40 MOTUL SA
FB-174516X 10W-30 FC-W 4-Stroke Sierra International
FB-20114N Evinrude Johnson Marine Stern Drive 25W40 Oil Bombardier Recreational Products, Inc.
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-255141Z Quicksilver 10W30 Full Synthetic Mercury Marine
FB-31001B Tohatsu Premium Four-Stroke Oil Tohatsu America Corp.
FB-320054X 25W-40 FC-W Semi Synthetic Sierra International
FB-357638X 25W-40 FC-W 4-Stroke Sierra International
FB-367231Z Mercury Racing 10W30 Full Synthetic Mercury Marine
FB-37565U KPO Jetski Watercraft 10w-40 Kawasaki Motors Corp., U.S.A.
FB-38003W Motul Outboard Tech 4T 10w-30 MOTUL SA
FB-419972C Mercury Racing 25W50 Synthetic Blend Mercury Marine
FB-43069W Marine Full Synthetic 5W-30 Yamaha Motor Canada Ltd.
FB-43072W Marine Performance 10W-30 Yamaha Motor Canada Ltd.
FB-43547X ADDINOL Aquapower Outboard 4T 1040 ADDINOL Lube Oil GmbH
FB-546901X 10W-40 FC-W Semi Synthetic Sierra International
FB-572441C Quicksilver High Performance 25W50 Synthetic Blend 4T Mercury Marine
FB-586638A FCW 20W-40 Conventional/Mineral Sierra International
FB-731436X 10W-30 Synthetic Sierra International
FB-737114Z Mercury 10W30 Full Synthetic Mercury Marine
FB-781778Y Marine Four Stroke Full Synthetic 10W-40 Penrite Oil Company Pty Ltd
FB-804392C YAMALUBE 5W30 FULL SYN MARINE FCW Yamaha Motor Corporation
FB-80460T Yamalube Marine Performance FC-W 10W-30 Yamaha Motor Distribution Latin America Inc.
FB-80814K Nautic 4T SAE 10W-30 Comercial Roshfrans, S.A. de C.V.
FB-80815K Nautic 4T SAE 25W-40 Comercial Roshfrans, S.A. de C.V.
FB-83138K RAVENOL OUTBOARDOEL 4T SAE 15W-40 Ravensberger Schmierstoffvertrieb GmbH
FB-85003K Quicksilver Synthetic Verado 4-Stroke Outboard Oil 25W-50 Brunswick Marine in EMEA

For more information regarding oil certification, contact:

Scott Berry
Vice President of Engineering Standards