Historically, gasoline-powered inboard and inboard/outboard (sterndrive) boats have been equipped with four-stroke cycle engines. With growing interest and legislation in reducing marine engine emissions, these four-stroke cycle engines are now appearing with exhaust after-treatment. In recognition of emerging four-stroke cycle engines with catalysts in the marine market and their unique lubrication demands, the NMMA Oil Certification Committee initiated the development of a new four-stroke cycle engine oil specification, “NMMA FC-W Catalyst Compatible®.”

The need to protect the catalysts adds another dimension to the lubrication demands of marine engines whose duty cycles have always discriminated them from over-the-road light and heavy duty automotive engines. High loads, high speeds, and exposure to high levels of humidity and salt water are just a few of the unique characteristics found in the marine environment.

This new catalyst-compatible standard draws heavily on the experience and success of the earlier NMMA FC-W® standard, which was developed to meet the needs of large and technically advanced four-stroke cycle marine engines. These include four-stroke cycle outboard engines, which are now taking the place of some conventional two-stroke cycle outboard engines. As a result, the new catalyst-compatible standard can provide the performance required for engines that would otherwise call for NMMA FC-W® lubricants.

This new catalyst-compatible specification follows the longstanding and successful tradition of BIA TC-W, NMMA TC-WII®, NMMA TC-W3®, and NMMA FC-W® programs to assist boaters and manufacturers in identifying the proper engine oils which have been specially formulated to withstand the rigors of use in marine engines. The NMMA FC-W Catalyst Compatible® specification is intended to support the industry in providing long term durability, power and overall consumer satisfaction with marine engines utilizing catalyst after-treatment.
 

2025 FC-W (CAT)® Marine Oils

Number Name Company
FC-00359P Mercury 10w30 Mineral Exclusive Mercury Marine
FC-00760P Mineral FC-W Catalyst Compatible 10W-30 Sierra International
FC-00806L Lucas SAE 10W-40 (Catalyst Compatable) Lucas Oil Products, Inc.
FC-00807L Lucas SAE 10W-30 (Catalyst Compatible) Lucas Oil Products, Inc.
FC-00812M Lucas SAE 25W-40 FC-W Catalyst Compatible engine oil Lucas Oil Products, Inc.
FC-00821N Quicksilver 10w30 Mercury Marine
FC-00833T AMSOIL 10W-30 Synthetic Marine Engine Oil AMSOIL Inc.
FC-00850T AMSOIL 10W-40 Synthetic Marine Engine Oil AMSOIL Inc.
FC-017023Y Mystik JT-4 Synthetic 4-Cycle 10W-30 Marine Engine Oil Citgo Petroleum Corporation
FC-01750T Pro Star 4 Stroke 25W40 Outboard Oil KINPAK, INC.
FC-01810T Pro Star 4 Stroke 10W40 Outboard Oil KINPAK, INC.
FC-01820T Pro Star 4 Stroke 10W30 Outboard Oil KINPAK, INC.
FC-020436A Pennzoil Marine Premium Plus Outboard 4-Cycle 10W-30 Pennzoil-Quaker State Company
FC-053842Z Sierra 10W-30 Semi-Synthetic Catalyst Compatible Oil Sierra International
FC-105159D Synergy Synthetic Marine ExP 10W-40 Northland Products Company
FC-11298X Ravenol Outboardoel 4T SAE 10W-40 Ravensberger Schmierstoffvertrieb GmbH
FC-11810P Mineral FC-W Catalyst Compatible 25W-40 Sierra International
FC-11811P Synthetic Blend FC-W Catalyst Compatible 25W-40 Sierra International
FC-11825T AMSOIL 25W-40 Synthetic Blend Marine Motor Oil AMSOIL Inc.
FC-118905Z Starbrite Star Tron 25W40 KINPAK, INC.
FC-135468C Mercury 10W30 Synthetic Blend 4T Mercury Marine
FC-14350X Outboard 500 4T 10W-40 YACCO
FC-14937W Wolf Outboard 4T 10W30 Wolf Oil Corporation N.V.
FC-158844A NEPTUNA SPEEDER 25W-40 TotalEnergies Lubrifiants
FC-162395Z Starbrite Star Tron 10W30 KINPAK, INC.
FC-169399Y Bass Pro 4-Stroke Oil 10W-30 Amalie Oil Company
FC-213406C Quicksilver 25W40 Synthetic Blend 4T Mercury Marine
FC-218129C Mercury 25W40 Mineral 4T Mercury Marine
FC-251582D Synergy Synthetic Marine ExP 25W-40 Northland Products Company
FC-256503X Titan Marine FC-W SAE 10W-30 FUCHS SE
FC-278631A NEPTUNA SPEEDER 10W-30 TotalEnergies Lubrifiants
FC-287280A Sierra Full Syn FC-W CAT 10W-40 Sierra International
FC-327087C Quicksilver 25W40 Mineral Mercury Marine
FC-350367Z LIQUI MOLY Marine 4T Motor Oil 10W-30 Liqui Moly GmbH
FC-37994W Power Marine FC-W (CAT) 10W-30 Armorine SAS
FC-38277W Champion Outboard 4T 10W30 Champion Chemicals N.V.
FC-418446Y Mystik JT-4 Synthetic Blend 4-Cycle 25W-40 Marine Engine Oil Citgo Petroleum Corporation
FC-427822C Starbrite Star Tron 10W40 KINPAK, INC.
FC-433009X Havoline Synthetic Blend 4-Cycle Outboard Engine Oil SAE 10W-30 Chevron Global Lubricants
FC-43508X Outboard 500 4T 25W-40 YACCO
FC-43514X Ravenol Marine Oil Petrol SAE 25W-40 Ravensberger Schmierstoffvertrieb GmbH
FC-43517X Ravenol Outboardoel 4T SAE 25W-40 Ravensberger Schmierstoffvertrieb GmbH
FC-481526D Synergy Synthetic Marine ExP 10W-30 Northland Products Company
FC-51534X Ravenol Outboardoel 4T SAE 10W-30 Ravensberger Schmierstoffvertrieb GmbH
FC-525443A Pennzoil Marine Premium Plus Outboard 4-Cycle 25W-40 Pennzoil-Quaker State Company
FC-576163Y Mystik JT-4 Synthetic 4-Cycle 10W-40 Marine Engine Oil Citgo Petroleum Corporation
FC-589712Y Quicksilver 10W40 Mercury Marine
FC-603467C Mercury 25W40 Synthetic Blend Mercury Marine
FC-688747A Pennzoil Marine Premium Plus Outboard 4-Cycle 10W-40 Pennzoil-Quaker State Company
FC-704576Y Bass Pro 4-Stroke Oil 25W-40 Amalie Oil Company
FC-738288Z LIQUI MOLY Marine 4T Motor Oil 25W-40 Liqui Moly GmbH
FC-743608B POWER MARINE FCW 10W-40 Armorine SAS
FC-783006Z LIQUI MOLY Marine 4T Motor Oil 25W-50 Liqui Moly GmbH
FC-824397C YAMALUBE 5W30 FULL SYN MARINE FCW Yamaha Motor Corporation
FC-885969C MOTOREX YORK OCEAN FC 4T SAE 10W/40 MOTOREX AG
FC-91435X Outboard 500 4T 10W-30 YACCO
FC-955559C Quicksilver 10W30 Synthetic Blend 4T Mercury Marine

For more information regarding oil certification, contact:

Scott Berry
Senior Director, Engineering Standards
312.946.6254