Sierra 18-9420-7 94207 10W30 FCW 4Stroke Outboard Oil, 55 Gal. Drum

Why Choose Sierra 10W-30 FC-W 4-Stroke Outboard Oil for Your Marine Engine?

Keeping your outboard motor running smoothly starts with the right lubrication. Sierra 10W-30 FC-W 4-Stroke Outboard Oil stands out as a reliable choice for boaters who demand peak performance from their engines. Designed specifically for the rigors of marine environments, this high-quality oil protects against the unique stresses of saltwater exposure, high RPMs, and variable temperatures. Whether you're powering through choppy waves or cruising calm waters, it delivers consistent protection that extends engine life and boosts efficiency.

Superior Protection Tailored for Marine 4-Stroke Engines

This premium synthetic-blend formula goes beyond basic lubrication. It incorporates advanced anti-wear additives that shield critical components like pistons, bearings, and camshafts from friction and metal-to-metal contact. In the harsh marine world, where water intrusion and corrosion are constant threats, its robust corrosion inhibitors form a tough barrier, preventing rust even during extended storage periods.

• Exceptional Anti-Wear Performance: Reduces wear by up to 30% compared to standard oils, based on independent lab tests for marine applications.
• Maximum Corrosion Defense: Neutralizes acids from combustion and combats saltwater-induced pitting.
• Sludge Reduction for Cleaner Operation: Detergent packages keep internals spotless, improving fuel economy and power output over time.
• Cold-Start Reliability: 10W viscosity ensures quick flow in cooler conditions, minimizing startup wear.

Meets Rigorous Industry Standards for Peace of Mind

Certified to NMMA FC-W® standards, this oil meets or surpasses the specifications set by leading outboard manufacturers. It also aligns with API SJ, CF-2, and CH-4 ratings, making it a versatile option for a wide range of 4-stroke engines. Boaters trust it because it eliminates guesswork—pour it in and know your motor is covered under warranty where applicable.

Ideal for both recreational and commercial use, the 55-gallon drum format suits marine shops, fleets, and high-volume users who need bulk reliability without frequent reordering.

Pro Tips for Optimal Performance and Longevity

To get the most from your Sierra outboard oil:

1. Change oil every 100 hours of operation or annually, whichever comes first, and always inspect filters.
2. Monitor oil levels before each outing, especially after trailering.
3. Pair with a high-quality marine filter for complete system protection.
4. For high-performance setups, consider more frequent changes during heavy-use seasons.

Users report smoother idling, quieter operation, and noticeable improvements in throttle response after switching to this FC-W certified oil.

Compatible with Top Outboard Brands

Formulated to work seamlessly with engines from Mercury, Yamaha, Evinrude/Johnson, Suzuki, Honda, and more. It's a drop-in replacement that maintains manufacturer performance specs, helping you avoid costly downtime.