Star Brite 028332P Super Premium Synthetic Blend 4-Stroke Outboard Oil 25W-40 32 oz

Star Brite Super Premium Synthetic Blend 4-Stroke Marine Engine Oil 25W-40 is a high-performance lubricant engineered specifically for the demanding conditions of marine environments. Available in a convenient 32 oz bottle, this synthetic blend oil delivers superior protection and performance for 4-stroke marine engines operating in both freshwater and saltwater conditions.

Key Features:

• NMMA FC-W Certified — One of the first 4-stroke marine oils to meet NMMA's stringent FC-W certification criteria, including viscosity, filter plugging, foaming, and aeration standards
• Passes NMMA 100-Hour Test — Successfully completed NMMA's rigorous 100-hour general performance engine test
• Shear-Stable Polymer Additives — Maintains proper viscosity under extremely harsh marine conditions and high-RPM operation
• Anti-Sludge Formula — Advanced additive package optimizes engine cleanliness and prevents sludge buildup
• Excellent Cold-Start Performance — Synthetic/organic blend provides superior low-temperature properties for quick, reliable starts
• Exceeds API Standards — Surpasses API service requirements for SJ, CF-4, and CH-4 categories
• Synthetic Blend Base Stocks — Combines synthetic and organic base stocks for maximum protection at high RPMs typical of marine engines

Designed For: High-performance 4-stroke outboard motors, gasoline inboards, and stern drives. Compatible with major outboard brands including Honda, Mercury, Yamaha, Nissan, Johnson, Suzuki, and Tohatsu.

Star Brite's 25W-40 formulation is specifically optimized for the higher RPM demands of marine engines, which far exceed the stress levels of typical automotive applications — making it the ideal choice for boaters who demand the best engine protection on the water.