Sierra 18-9440CAT-4 Synthetic Blend 4-Cycle Marine Engine Oil 25W40 FC-W 5 Quart

Sierra 18-9440CAT-4 is a premium synthetic blend marine engine oil specifically formulated for modern 4-stroke inboard and sterndrive engines. This 25W40 FC-W certified oil is engineered to meet the demanding requirements of recreational marine engines, including those equipped with emission catalyst systems.

Key Features:

• NMMA FC-W® Certified and API-SL rated for marine engine protection
• Advanced corrosion protection to minimize internal engine corrosion in harsh marine environments
• Superior detergent and dispersant properties suspend contaminants and prevent sludge formation
• Industry-leading wear protection and deposit control for extended engine life
• Exceptional viscosity stability prevents oil thinning during extreme performance operations
• ZDDP anti-wear additive technology prevents phosphorus depletion and extends catalyst life
• Compatible with engines with or without emission catalyst systems

This synthetic blend formulation provides superior protection compared to conventional oils while maintaining compatibility with all marine engine seals and gaskets. The 25W40 viscosity grade offers excellent flow characteristics for cold starts while maintaining protective film strength at high operating temperatures. Each bottle contains 5 quarts of oil. Sold in case packs only.