Sierra 18-9400CAT-7 4-Cycle Stern Drive Engine Oil 25W40 FC-W 55 Gallon Drum

Sierra 18-9400CAT-7 is a premium NMMA FC-W Catalyst Compatible 4-cycle marine engine oil specifically engineered for modern four-stroke stern drive and inboard engines. This 25W40 viscosity oil is designed to protect engines with or without emission catalyst systems, delivering superior performance in the extreme operating conditions common to recreational marine applications.

Key Features:

• Industry-leading wear protection and deposit control for maximum engine longevity
• Minimizes internal engine corrosion in harsh marine environments
• Enhanced detergent and dispersant properties suspend contaminants and prevent sludge formation
• Reduces engine friction for improved efficiency and performance
• High-quality base stocks resist thermal and oxidative breakdown
• Highly shear-stable viscosity stabilizers prevent excessive oil thinning under stress
• Advanced thermally stable ZDDP anti-wear additive technology prevents phosphorus depletion and extends catalyst life

This FC-W certified formula meets the stringent requirements of modern four-stroke marine engines, providing complete protection for both catalyzed and non-catalyzed systems. Packaged in a 55-gallon drum for high-volume marine service operations and commercial applications.