Premium 4-Stroke Marine Oil for Outboards, Inboards & Stern Drives

Engineered specifically for high-performance outboards, gasoline inboards, and stern drives, STAR BRITE Super Premium Synthetic Blend 4 Stroke Oil 10W-30 is the ultimate choice for those demanding the highest level of performance and protection. Unlock the full potential of your marine engine with this premium synthetic blend oil, which sets the standard in marine engine lubrication.

Formulated with advanced shear-stable polymer additives and synthetic base stocks, this oil maintains proper viscosity under the most extreme marine conditions, providing quicker starts and maximum protection even at high RPMs. Ideal for marine engines that operate at higher RPMs than automotive engines, it surpasses API requirements for SJ, CF-4, and CH-4, offering superior protection against sludge build-up and wear.

The unique blend of additives and synthetic base stocks ensures exceptional low-temperature properties, allowing for quicker and more reliable engine starts in harsh marine environments. Furthermore, the oil meets or exceeds the stringent requirements of the NMMA FC-W certification, designed specifically for 4-stroke outboard motors, ensuring top-tier performance.

The advanced additive package optimizes engine cleanliness, effectively preventing sludge and deposit buildup for a smoother, more efficient engine operation. By surpassing the most demanding OEM requirements and API requirements, this oil ensures your engine's warranty remains intact.

Proudly made in the USA by Star brite, a leader in marine, auto, RV, and home care since 1973, this oil is trusted globally for its unmatched quality. Specifically designed to meet the harsh demands of saltwater and freshwater environments, it offers superior protection against wear and corrosion, preventing sludge and varnish build-up and keeping your engine running cleaner and longer.

To ensure optimal engine performance and longevity, follow your engine manufacturer's recommendations for oil change intervals and procedures. With its high-performance formula, STAR BRITE Super Premium Synthetic Blend 4 Stroke Oil 10W-30 is the ideal choice for those seeking unparalleled engine protection and efficiency in marine applications.

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