MERCURY 2-Stroke Marine Engine Oil, 1 Gallon — Synthetic-Blend TC-W3 Protection

Mercury Premium Plus TC-W3 is a 1-gallon synthetic-blend 2-stroke marine engine oil formulated to protect and prolong mid- to high-horsepower outboards and personal watercraft under heavy use.

Designed by Mercury Marine to meet NMMA TC-W3 specifications, this synthetic-blend formula works in oil-injected, premix, carbureted and EFI 2-stroke engines. It reduces wear, guards against corrosion and limits carbon build-up so engines run cleaner and maintain power through high speeds, long runs and hard loads. The 1-gallon container offers convenient storage and refilling for seasonal maintenance or frequent boating.

How does this oil protect engines during high-speed or heavy-load operation?

The Premium Plus formula includes advanced additives that maintain lubricity at elevated temperatures and under continuous throttle. That helps prevent metal-to-metal contact and reduces wear across critical components, even during extended full-throttle use.

• Thermally stable synthetic-blend base reduces breakdown at high RPMs
• Wear inhibitors protect pistons, bearings and crankcases
• Corrosion inhibitors defend against saltwater and moisture damage

Will this oil work in my oil-injected or premix 2-stroke outboard?

Yes — Mercury Premium Plus is formulated for both oil-injected systems and premix applications and is compatible with carbureted and EFI 2-stroke engines. It meets TC-W3 standards accepted by major outboard and PWC manufacturers, ensuring broad compatibility and performance.

• Approved for oil-injected and manual premix engines
• Compatible with carbureted and electronic fuel-injected (EFI) setups
• Meets NMMA TC-W3 requirements for manufacturer-recommended use

How does this oil help keep my engine clean and efficient?

The blend contains detergents and dispersants designed to minimize carbon and varnish deposits that can sap power and efficiency. Regular use reduces deposit accumulation on rings and exhaust ports, helping preserve peak engine output and smoother throttle response.

• Reduces carbon build-up on pistons and exhaust ports
• Detergent action helps keep fuel passages and injectors cleaner
• Supports reliable starting and consistent throttle performance over time

How is this product backed by Mercury Marine?

Produced to Mercury Marine's original equipment specifications, Premium Plus benefits from the company's decades of motor and marine engineering. That means formulation, testing and quality control geared specifically for recreational and light-commercial outboard needs.

• Manufactured to OEM standards by Mercury Marine
• Subject to marine-specific testing for wear, corrosion and deposit control
• Available in a convenient 1-gallon bottle for maintenance intervals

Who is this for: Mercury Premium Plus TC-W3 1-gallon oil is intended for boat owners, marine technicians and watersport enthusiasts who operate mid- to high-horsepower 2-stroke outboards or personal watercraft and want an OEM-grade synthetic blend that reduces wear, limits deposits and resists corrosion under demanding conditions. It's a practical choice for anyone looking to maintain peak engine performance across seasons and varied boating conditions.