4-Stroke Oil

The SYNTHETIC BLEND Mercury'R Stern Drive 5 Quart (18-9440-4) is Blended 4-cycle oil with superior synthetic and mineral-based stock. Superior additives intended to withstand the stresses that sterndrive and inboard engines face. Protection against...

Sierra's 10W-30 FC-W Full Synthetic Oil is made up of a unique blend of synthetic base oil and a well-balanced additive system that satisfies FC-W specifications. Synthetic oils are for both outboard and sterndrive applications. Engines that use...

Full synthetic engine oil is made out of synthetic base stock and a selection of additives that improve the oil's performance. Full synthetic oil provides a higher level of protection than traditional or synthetic blends, meeting the basic lubricant...

Seastar Solutions is a leading brand that manufactures superior and quality standard engine parts and accessories. The Ctlst Oil 25W40 Synthetic Blnd 5 Quart - Sierra Marine Engine Parts (18-9440CAT-4) is the perfect blend of oil made to protect your...

Engines are considered the heart of your vessel and deserve to have the best oil solutions. Bad oil choices can cause more damage and cost for your boat. Worry no more! Seastar Solutions got you covered. Seastar Solutions is one of the leading brands for...

Protect your engine at all costs. Choose only the product that will give you the best quality results. Seastar Solutions is one of the leading manufacturers that provides quality and durability marine engines and accessories. The SYNTHETIC BLEND 4 STROKE...

The life of the catalyst by modern ZDDP additive technology prevents phosphorus depletion. To fulfills or exceed the standards of the API SM category and fully and exceed the specifications for FC-W catalyst and FC-W. This ultra-high performance oil uses...

A healthy engine provides a smooth and stress-free ride. Lubrication is critical to an engine's longevity. Without oil, an engine would quickly overheat and seize. The Catalyst Oil 25W40 Mineral 5 Quart - Sierra Marine Engine Parts (18-9400CAT-4) is one...

This 10W-30 is high-performance motor oil, the formula that meets or surpasses the demanding needs of marine four-stroke engines. It has superior base stock and highly refined additives. Applicable for four-stroke outboard motor oil. 10W-30 has a high...

Sierra offers a whole line of direct replacement weight oils specifically blended to protect your engine in the harsh marine environment and the extreme load conditions your engine endures every time you push down on the throttle. A gallon size, case of...

Our NMMA FC-W Catalyst Compatible Engine Oils fulfills the specific needs of current 4-stroke recreational engines, whether they have or don't have emission catalyst systems. It passes all approval for all 4-Stroke A applications, including outboard,...

Engine oil is the lifeblood of any machine, piece of equipment, or vehicle, as it allows the machines/equipment to perform at their best. The engine oil cools, cleans, and evenly lubricates the engine's moving parts. It prevents metal components from...