Experience superior engine protection with Sierra International 25W 50 FC-W Synthetic Blend Engine Oil. This high-performance oil is specially formulated for marine engines, ensuring optimal lubrication and reduced wear. With a viscosity of 25W-50, it provides excellent performance in both high and low temperatures. The synthetic blend enhances fuel efficiency while meeting stringent FC-W standards, making it perfect for both inboard and outboard engines. Packaged in a convenient 4-liter container, this engine oil is your go-to solution for maintaining engine health and longevity. Keep your boat running smoothly with Sierra!