The Sierra 18-9551-3 Semi-Synthetic Marine Oil 10W-40 FC-W 1 Gallon is a high-quality boat engine oil manufactured by Sierra, a trusted brand in the industry. Made in the United States, this semi-synthetic oil provides excellent protection for marine engines, ensuring smooth operation and long-lasting performance. With a limited lifetime warranty, boat owners can rely on the quality and durability of this product to keep their engines running smoothly on the water.
