Oils, Additives and Greases

Honda Marine SAE 90 GL-4 is a genuine gearcase oil for Honda outboard engine lower units. Formulated to GL-4 standards, this oil ensures smooth gear shifting and optimal lubrication of the gears in all Honda 2-stroke and 4-stroke outboard models. With high thermal stability and anti-corrosion additives, Honda Gear Oil SAE 90 protects the gearbox from wear, rust, and foaming, extending the life of your engine’s transmission.

• OEM Honda oil – the same lubricant your engine was factory-filled with, guaranteeing compatibility and reliability
• API GL-4 specification – provides necessary gear protection without excessive EP additives, ideal for Honda gearcases
• Smooth gear shifting – specially formulated for easy gear changes and minimal friction in the lower unit
• Wear and corrosion protection – additives guard against metal wear and rust, even during long operation in saltwater
• High stability – resistant to thermal breakdown, maintaining viscosity and protective film under high temperatures and loads

Quicksilver Premium 80W-90 is a high-quality gear lubricant specifically formulated for outboard engine gearcases below ~75 HP, as well as certain sterndrives. This mineral-based gear oil provides excellent lubrication and protection against wear and corrosion, even in the presence of moisture. Special emulsifiers in its formula allow the oil to maintain its protective qualities even if water enters the gearcase, preventing damage and rust.

• Protects against wear and corrosion – extends the life of gears and bearings in marine environments
• Recommended for outboard gearcases up to 75 HP – ideal for small and mid-size boats and runabouts
• Improved emulsifiers – shields gears even if water intrudes, preventing loss of lubrication
• Genuine Mercury product – produced to OEM specifications for Mercury/Mariner, ensuring compatibility and high quality
• Proven reliability – developed with Mercury Marine’s expertise to outperform automotive oils in marine applications

Quicksilver Performance DFI is a high-performance, synthetic-blend 2-stroke oil specifically formulated for outboard engines with Direct Fuel Injection (DFI), including Mercury OptiMax, Yamaha HPDI, Evinrude E-TEC, and other modern engines. With a unique blend of enhanced base oils and synthetic additives, this oil minimizes carbon deposits and keeps engines clean and responsive, while providing superior lubrication at high RPM and temperatures. The result is extended engine life, maximum power output, and reduced smoke.

• Designed for DFI engines – ideal for Mercury OptiMax, Yamaha HPDI, Evinrude E-TEC, and similar direct-injected 2-stroke systems
• Synthetic carbon-fighting additives – significantly reduce carbon buildup, preserving compression and engine efficiency
• High-load protection – guards cylinders against scuffing and wear under extreme RPM and heat
• Lower smoke and odor – clean-burning formulation with low smoke output for a better boating experience
• NMMA TC-W3 approved – meets TC-W3 standards while excelling under the demands of DFI applications

Yamalube TCW3-R is a premium 2-stroke outboard oil, tested and approved by Yamaha Motor. This oil delivers a combination of exceptional wear protection and corrosion resistance, ensuring maximum power and reliability from your engine. Featuring Extreme Pressure anti-wear additives, Yamalube TCW3-R maintains a stable oil film under high loads, safeguarding the engine even in demanding conditions. It boasts resistance to thermal breakdown and water washout, making it ideal for use in both saltwater and freshwater.

• High-performance Yamaha oil – designed for peak performance of 2-stroke outboards, approved by Yamaha racing teams
• EP (Extreme Pressure) protection – retains lubrication under extreme pressures, preventing piston and bearing wear at high RPM
• Strong anti-corrosion formula – shields parts from rust in marine environments, even with prolonged saltwater exposure
• High thermal stability – won’t lose viscosity or effectiveness at high temperatures; maintains oil film during cold starts and hot runs
• Low maintenance – clean burning with minimal deposits, keeping spark plugs and exhaust systems cleaner for longer, reducing service frequency

Quicksilver High Performance SAE 90 is a specialized gear oil that provides maximum protection for outboard and sterndrive lower units in engines above 75 HP. With its exclusive formula, it shields gears from metal-to-metal contact and extends their life under extreme conditions – high speeds, high horsepower, and prolonged operation. High Performance lube retains its protective qualities even if water enters the gearcase, helping prevent failures and corrosion.

• Maximum EP protection – prevents wear and gear-to-gear contact under high loads and RPM
• Recommended for >75 HP – ideal for high-power outboards (V6/V8) and MerCruiser sterndrives
• Withstands extremes – safeguards at high speed, high torque, and heavy-duty conditions, including racing and offshore use
• Shields against water intrusion – maintains lubrication and prevents damage if water enters the gear housing (e.g., via a bad seal)
• OEM quality – developed by Mercury, it meets strict factory specs for Mercury/Quicksilver, ensuring top quality and compatibility

High-quality GL4 (SAE 90) gear oil specifically developed by Yamaha for outboard engine gearcases. It provides outstanding wear and corrosion protection, even in harsh saltwater and high-humidity conditions. An ideal choice for small to mid-size outboard motors that require a GL-4 specification gear lubricant.

• API GL-4 rating – safe for gearboxes with yellow metal (brass/bronze) components.
• Premium mineral base with stable viscosity – ensures reliable lubrication across a wide temperature range.
• Excellent corrosion and rust protection – shields gears in marine environments (saltwater, high humidity).
• Low-foaming formula – maintains effective lubrication and cooling inside the lower unit.

Genuine Suzuki Marine 10W-40 semi-synthetic oil designed for 4-stroke outboard engines. Formulated to deliver maximum protection and performance for Suzuki motors in marine environments – from small portables to high-output engines. Meets API SL and NMMA FC-W standards to ensure reliable operation, corrosion protection, and long engine life.

• Semi-synthetic blend – provides stable viscosity and slower breakdown under high RPM and heavy loads.
• NMMA FC-W® certified – specially built for marine use, resists water contamination, prevents rust, and minimizes deposits.
• Advanced additive package – reduces wear on moving parts, keeps the engine internals clean from carbon and sludge.
• Wide compatibility – ideal for all Suzuki 4-stroke outboards and any other brands requiring 10W-40 oil meeting API SL/FC-W specifications.

Premium Yamalube GL5 (SAE 90) gear oil designed to withstand extreme pressures in the gearcases of the most powerful outboard engines and sterndrive systems. Developed and approved by Yamaha for V6/V8 outboards (including the flagship V8 F350) and other applications requiring GL-5 specification. It features enhanced extreme-pressure additives for high load protection, superior corrosion resistance, and stability under high temperatures.

• GL-5 heavy-duty formula – provides exceptional oil film strength under extreme pressure and shock loads between gears.
• High-power protection – specifically engineered for large outboards (V6, V8) and sterndrive gearcases where standard GL-4 oils are insufficient.
• Strong anti-corrosion properties – shields the lower unit’s internals from rust and corrosion, even with prolonged saltwater exposure.
• Excellent thermal and oxidative stability – resists breakdown at elevated temperatures, prevents deposit formation around seals, and retains viscosity for reliable lubrication.

Genuine Honda 10W-30 oil for 4-stroke outboard engines, formulated to deliver optimal performance and long engine life. This high-quality lubricant meets API SJ/SL and NMMA FC-W standards, providing excellent protection against wear, corrosion, and deposits. Suitable for all Honda outboard models and other brands requiring 10W-30 viscosity.

• Specifically developed for Honda Marine – ensures compatibility with all Honda 4-stroke motors and meets factory service requirements.
• 10W-30 broad temperature range – aids cold starts and maintains a stable oil film at high operating temperatures.
• Enriched with anti-wear and anti-rust additives – extends engine lifespan by safeguarding internal components in saltwater use and during storage.
• Cleaner running and fuel-efficient – formula reduces friction for smoother engine operation and lower emissions.

Quicksilver Quickstor is a high-performance fuel stabilizer designed to keep gasoline fresh during long-term storage of boats and engines. It prevents regular and ethanol-blended fuel from breaking down or oxidizing for up to 12 months, protecting the fuel system from corrosion, gum, and varnish deposits. Perfect for winterizing outboards, personal watercraft, generators, and other gasoline equipment.

• Prevents degradation of both regular and ethanol-blend gasoline (E5, E10) during storage.
• Stabilizes fuel for up to 1 year – ensures easy starts and smooth running even after long lay-ups.
• Guards against rust and corrosion in the tank, fuel lines, carburetors, and injectors.
• Stops gum and varnish formation – keeps fuel systems clean and free of clogs.