Due to the nature of two-stroke marine engines, two-stroke oil lubricates the engine parts as it passes through the engine and is then burned along with the fuel. Two-stroke oil is either physically mixed with the fuel or, in the case of direct fuel injection, is combined with the fuel in the combustion chamber. This is in contrast to four-stroke engines which have oil sumps circulate the oil by pumping it throughout the engines.

The long-term objectives of the two-stroke engine industry have been to reduce emissions which contain burned and unburned oil that have passed through the engine, and to develop a quality of oil that reduces the mixture ratio to fuel while extending the life of the engine. That means significantly reduced emissions to satisfy EPA requirements, less warranty problems, and increased customer satisfaction due to engines lasting longer with less maintenance and overhauls.

TC-W3® lubricant, an NMMA-owned trademark, has evolved over the years through much testing and research, and has proven to be the level of quality needed to satisfy the above objectives. And, going a step further, now that two-stroke engines have moved towards higher cylinder temperatures and compressions, this type of lubricant also helps to meet the EPA emissions reductions.

TC-W3® oils have demonstrated the necessary lubrication performance quality needed for these more demanding cylinder/engine conditions.

The TC-W3® oil standard is a performance-based qualification program. The requirements include various bench tests for fluidity, miscibility, rust, compatibility, etc., as well as engine tests to evaluate the prevention of ring sticking and carbon buildup on pistons and other engine parts. The engine tests include one Johnson 40 hp and two consecutive Mercury 15 hp tests, all of which are run under severe conditions for 100 hours each. Two additional engine tests are also conducted to ensure a high level of lubricity performance. The testing process is comprehensive and expensive, but worth the outcome for consumers and manufacturers.

Once lubricants have demonstrated the necessary lubrication performance qualities needed for TC-W3® certification testing by NMMA-approved laboratories, NMMA licenses those two-stroke lubricants to be marketed to the public. TC-W3® oils are licensed around the world and are recommended for use by two-stroke engine manufacturers.


2023 TC-W3® Registered Two-Stroke-Cycle Marine Oils

Number Name Company
RL-00405J Starbrite Super Premium TCW3 KINPAK, INC.
RL-00406J Starbrite Premium TCW3 KINPAK, INC.
RL-00444K Nautilus Premium Outboard Oil Pennzoil-Quaker State Company
RL-00447K Lucas Land & Sea Lucas Oil Products, Inc.
RL-035494Y WOLF OUTBOARD 2 STROKE TC-W3 DFI Wolf Oil Corporation N.V.
RL-058086Z MOL Outboard 2T MOL-LUB Ltd.
RL-098359A NEPTUNA 2T SUPER SPORT TotalEnergies Lubrifiants
RL-111104Z Fram Amalie Oil Company
RL-13125P Lucas Synthetic Blend 2-Cycle Marine Oil Lucas Oil Products, Inc.
RL-13136U SuperSyn Outboard 2-Cycle Marine Oil Smitty's Supply Inc.
RL-13139U Pennzoil Premium Outboard and Multipurpose 2-Cycle Oil Pennzoil-Quaker State Company
RL-13216U Super S Premium Outboard Oil Smitty's Supply Inc.
RL-13464U Shell Advance Premium Pennzoil-Quaker State Company
RL-13776U Bardahl Nautico 2T TC-W3 Bardahl de Mexico S. A. de C. V.
RL-13818U Marine 2 Temps TCWIII Minerva Oil SAS
RL-13837W Champion Outboard 2T TC-W3 Champion Chemicals N.V.
RL-13889W Chronus Outboard Water Cooled 2-Cycle Motor Oil Novergy Chemicals Corp
RL-13937W Wolf Outboard 2T TC-W3 Wolf Oil Corporation N.V.
RL-14116U CAM2 Blue Blood 2-Cycle Marine Oil Smitty's Supply Inc.
RL-14354X ADDINOL Aquapower Outboard 2T ADDINOL Lube Oil GmbH
RL-29152R SPC Outboard 2T Super Singapore Petroleum Company Limited
RL-30103K Lubrax Nautica Gasolina 2T / Petrobras Vibra Energia S.A.
RL-331679Y Outboard Two Stroke Marine TC-W3 Gulf Western Premium Quality Lubricating Oils Pty Ltd
RL-33301R LUBECO 2T Outboard Oil Biona Jersin, s.r.o.
RL-34644U Nautilus Premium Outboard Pennzoil-Quaker State Company
RL-363729A Yamalube 2M Yamaha Motor Corporation
RL-37590U KPO Jet Ski Watecraft 2-Stroke Oil Kawasaki Motors Corp., U.S.A.
RL-37761U Liqui Moly Marine 2T DFI Motor Oil Liqui Moly GmbH
RL-38293W Liqui Moly Marine 2T Motor Oil Liqui Moly GmbH
RL-414211Y Bass Pro Shops 2-Stroke Marine Engine Oil Amalie Oil Company
RL-43545X ADDINOL Aquapower Outboard 2T S ADDINOL Lube Oil GmbH
RL-437634Z HS X3M Amalie Oil Company
RL-511652A NEPTUNA 2T SUPER SPORT TotalEnergies Lubrifiants
RL-57170L Titan Marine TC-W 3 Fuchs Petrolub SE
RL-659929A VEEDOL FUERA DE BORDA SPECIAL 2T Veedol International Ltd
RL-740361A LUBRAL M2T-WTR Lubricantes de America S.A. de C.V.
RL-790144A NEPTUNA 2T BIO-JET TotalEnergies Lubrifiants
RL-80561W Terpel TC-W3 Omni Specialty Packaging
RL-859783A NEPTUNA 2T SUPER SPORT TotalEnergies Lubrifiants
RL-90042R IGOL Prosurf Aquasynth 2T TC-W3 IGOL France
RL-912225A NEPTUNA 2T SUPER SPORT TotalEnergies Lubrifiants
RL-93050R Master Pro TC-W3 Omni Specialty Packaging
RL-93051R Pure Guard TC-W3 Omni Specialty Packaging
RL-93052R Xtra-Rev TC-W3 Omni Specialty Packaging
RL-93100P Klondike 2-Cycle Engine Oil Klondike Lubricants Corp
RL-93110R Starfire Premium 2-Cycle Engine Oil Coolants Plus Inc.
RL-941799Z Starbrite Star Tron TC-W3 KINPAK, INC.
RL-96660T PUMA 2T Outboard TCW3 Puma Energy Supply & Trading PTE LTD (Panama Branch)
RL-96661T Raloy Dos Tiempos TC-W3 (Outboard 2T) Raloy Lubricantes, S.A. de C.V.
RL-99050M Syngard Premium Outboard TC-W3 Engine Oil Martin Lubricants; Div. of Martin Operating Partnership L.P.
RL-99060T Havoline 2-Cycle Engine Oil TC-W3 Lubrication Technologies, Inc. - Lube-Tech
RL-99990T Yamalube 2M Yamaha Motor Distribution Latin America Inc.
RL00151F Xcel Outboard & 2-Cycle Oil Amalie Oil Company
RL05012F Amalie Pro Two-Cycle TC-W3 Amalie Oil Company
RL10140 Avia Outboard Thevenin Ducrot Lubrifiants
RL27003G Pennsoil Marine Premium Plus Pennzoil-Quaker State Company
RL27004G Pennzoil Marine XLF Pennzoil-Quaker State Company
RL29018F RAVENOL Outboardoel 2T Teilsynth Ravensberger Schmierstoffvertrieb GmbH
RL29019G Ravenol Watercraft Fullsynth. 2-Takt Ravensberger Schmierstoffvertrieb GmbH
RL29901H Ravenol Watercraft Mineral 2-Takt Ravensberger Schmierstoffvertrieb GmbH
RL30010H Ravenol Watercraft Teilsynth 2-Takt Ravensberger Schmierstoffvertrieb GmbH
RL32257 Unil Opal Outboard TCW3 UNIL OPAL SAS
RL40462F Irving 2 Cycle + Irving Oil Limited dba Irving Blending & Packaging
RL50391 IGOL Prosurf TC-W3 IGOL France
RL90000G Ravenol Outboardoel 2T Mineral Ravensberger Schmierstoffvertrieb GmbH
RL90001G Ravenol Outboardoel 2T Fullsynth Ravensberger Schmierstoffvertrieb GmbH
RL93101 Klotz TC-W3 Klotz Synthetic Lubricants, Inc.
RL95102C Tohatsu Premium Outboard Oil Tohatsu America Corp.

For more information regarding oil certification, contact:

Scott Berry
Director of Engineering Standards