Sierra 118-9400-4 25W-40 4-Stroke Marine Engine Oil 5 Quart

Sierra's 25W-40 4-stroke marine engine oil is specifically developed for the marine environment and outperforms standard automotive engine oils. This premium blend oil offers excellent detergency, anti-oxidants, anti-wear, and corrosion protection for stern drive and inboard marine engines.

Key Features:

• Reduces wear to internal engine components
• Protects internal parts from corrosion and prevents ring sticking
• Keeps pistons cleaner for optimal performance
• Excellent low temperature operating properties
• Meets or exceeds API SJ, CF-4, and CH-4 performance standards
• Recommended for use in Mercruiser, OMC, and Volvo Penta engines

Stern drive and inboard engines operate under high load and running stresses, making proper lubrication critical for engine longevity. This 5-quart jug provides professional-grade protection engineered specifically for the demanding marine environment. Replaces Mercruiser part number 92-857389A1.