Sierra 18-9555CAT-2 5W-30 Semi-Synthetic FC-W CAT Marine Engine Oil (1 Quart)

Sierra 18-9555CAT-2 is a premium 5W-30 semi-synthetic marine engine oil specifically formulated to meet FC-W CAT (Catalyst Compatible) specifications for modern four-stroke outboard and sterndrive engines. This advanced formula provides superior protection for engines equipped with catalytic converters while delivering excellent performance across a wide temperature range.

Key Features:

• 5W-30 viscosity grade for optimal flow in cold starts and protection at operating temperatures
• Semi-synthetic formulation combines synthetic base oils with premium additives
• FC-W CAT certified for use in catalyst-equipped marine engines
• Protects against wear, corrosion, and deposit formation in saltwater and freshwater environments
• Helps maintain fuel efficiency and reduce emissions
• 1 quart (32 fl oz) bottle for convenient oil changes and top-offs

This marine-grade oil is engineered to withstand the demanding conditions of the marine environment, including extended periods at high RPM, temperature extremes, and exposure to moisture. Ideal for maintaining warranty compliance and extending engine life in Mercury, Yamaha, Honda, Suzuki, and other four-stroke marine engines requiring FC-W CAT approved lubricants.