Gear lube

Suzuki Marine Gear Oil 90 is a genuine gearcase lubricant (SAE 90, API GL-5) formulated for the lower unit (propeller gearbox) of Suzuki outboard engines. This Extreme Pressure (EP) oil provides enhanced protection for gears under heavy loads – ensuring a durable oil film and minimal wear even during extended full-throttle operation. It is engineered to withstand high temperatures, reduce gearcase noise, and guard against corrosion in humid and saltwater environments.

• API GL-5 hypoid gear oil SAE 90 – specially designed for Suzuki outboard motor gearboxes
• Extreme Pressure additives – handle high load and pressure, protecting gear teeth from wear and scuffing
• Thick oil film at temperature – maintains viscosity under high heat, ensuring reliable lubrication in severe conditions
• Quieter, smoother operation – special formulation dampens gearbox noise and prevents whining
• Anti-corrosion and anti-foam protection – guards against rust and foaming, even if water enters the gearcase

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 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.

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.