Sierra 18-9420CAT-3 4-Stroke Marine Engine Oil 10W-30 1 Gallon

Sierra 18-9420CAT-3 is a premium 4-stroke mineral formulation marine outboard engine oil designed specifically for the demanding conditions of marine environments. This highly refined petroleum product combines premium base stock with advanced additives to meet or exceed the rigorous requirements of leading marine engine manufacturers including Mercury, Yamaha, Johnson-Evinrude, and Suzuki.

Key Features:

• Excellent anti-wear characteristics that reduce friction and extend engine life
• Maximum corrosion protection formulated for saltwater and freshwater environments
• Advanced detergent additives reduce sludge buildup to keep engines cleaner for improved efficiency
• Low temperature viscosity for reliable cold starting performance
• 10W-30 viscosity grade provides optimal protection across a wide temperature range
• Meets and exceeds API SJ, CF-2, and CH-4 quality performance standards

This 1-gallon container provides convenient coverage for oil changes on most marine outboard engines. Sierra marine oils are engineered to protect critical engine components against the unique challenges of marine operation, including water contamination, salt exposure, and extended operation under load.