Sierra 118-9552-3 FC-W 25W-50 Semi-Synthetic 4-Stroke Marine Engine Oil - 4 Liter

The Sierra 118-9552-3 is a premium 4-liter container of FC-W certified 25W-50 semi-synthetic marine engine oil, specifically formulated for 4-stroke outboard and sterndrive engines. This advanced oil blend combines synthetic and conventional base stocks to deliver superior protection in demanding marine environments.

Key Features:

• FC-W (Four-Cycle Water-cooled) certified formula meets NMMA performance standards
• 25W-50 viscosity grade provides excellent protection across a wide temperature range
• Semi-synthetic formulation offers enhanced wear protection and thermal stability
• 4-liter capacity provides convenient quantity for most oil changes
• Designed specifically for marine 4-stroke engines including outboards, sterndrives, and inboards
• Advanced additives resist oxidation and prevent deposits in high-temperature marine applications
• Excellent corrosion protection for internal engine components exposed to marine environments

This marine-grade oil is engineered to handle the unique demands of water-cooled engines, including sustained high-RPM operation, saltwater exposure, and variable load conditions. The FC-W certification ensures this oil meets stringent marine industry standards for performance and protection.