Starbrite 028132 Pro-Star Synthetic Blend 4-Stroke Marine Engine Oil 10W-30 32oz

Starbrite Pro Star Super Premium Synthetic Blend 4-Stroke Oil is a high-performance marine engine oil specifically engineered for 4-stroke outboards, gasoline inboards, and stern drives operating in harsh saltwater environments. This premium oil was among the first 4-stroke oils to receive NMMA FC-W certification, meeting or exceeding all criteria for viscosity, filter plugging, foaming, and aeration while successfully passing the rigorous 100-hour general performance engine test.

Key Features:

• SAE 10W-30 synthetic blend formulation optimized for marine applications
• NMMA FC-W certified and surpasses API requirements for SJ, CF-4, and CH-4
• Advanced additive package prevents sludge buildup and optimizes engine cleanliness
• Shear-stable polymer additives plus synthetic base stocks maintain proper viscosity under extreme marine conditions
• Excellent low-temperature properties ensure quick, reliable starts
• Provides maximum protection in severe, high-RPM applications
• Compatible with Honda, Mercury, Yamaha, Nissan, Johnson, Suzuki, and Tohatsu outboards

The synthetic/organic blend combines the durability advantages of synthetic lubricants with cost-effective performance, making it ideal for high-performance 4-stroke marine engines that demand superior protection. Each 32-ounce bottle delivers reliable lubrication engineered specifically for the unique demands of marine engines operating at higher RPMs than automotive applications.