{"product_id":"sierra-synthetic-blend-4-stroke-marine-engine-oil-25w40-fcw-55-gallon-drum-9440cat7","title":"Sierra Synthetic Blend 4-Stroke Marine Engine Oil, 25W40 FC-W, 55-Gallon Drum – 9440CAT7","description":"\u003ch2\u003eSierra Synthetic Blend 4-Stroke Marine Engine Oil – 25W40 FC-W | 55-Gallon Drum | Part #9440CAT7\u003c\/h2\u003e\u003cp\u003eA synthetic-blend 25W40 marine engine oil formulated specifically for 4-stroke inboard and sterndrive engines, including those equipped with emission catalyst systems. The 55-gallon drum format is designed for marinas, marine service shops, and commercial operations that perform high volumes of engine oil services and want the cost and convenience advantages of bulk dispensing.\u003c\/p\u003e\u003ch3\u003eFormulated for Catalyst-Equipped Engines\u003c\/h3\u003e\u003cp\u003eThe CAT designation in the part number indicates this oil is engineered to be safe for use with emission catalyst systems — a critical requirement for modern 4-stroke marine engines. The ZDDP anti-wear additive package is carefully balanced to deliver strong wear protection without depleting phosphorus in a way that damages catalytic converters, extending both engine and catalyst life.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNMMA FC-W® Certified \/ API-SL\u003c\/strong\u003e — meets the marine industry’s standard for 4-stroke engine oils and is approved for use in engines requiring FC-W certification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalyst-safe formulation\u003c\/strong\u003e — ZDDP anti-wear technology protects against phosphorus depletion to extend emission catalyst life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSynthetic blend base\u003c\/strong\u003e — better thermal stability and oxidation resistance than conventional mineral oil, at a lower cost than full synthetic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSAE 25W40 viscosity\u003c\/strong\u003e — the correct grade for most 4-stroke inboard and sterndrive marine engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced detergents and dispersants\u003c\/strong\u003e — suspends contaminants and prevents sludge formation to keep engine internals clean\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion inhibitors\u003c\/strong\u003e — protects internal engine components against the corrosive effects of the marine environment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWear protection and deposit control\u003c\/strong\u003e — industry-leading additive package for extended engine life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents viscosity thinning\u003c\/strong\u003e — maintains oil film strength under extreme performance conditions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eViscosity: SAE 25W40\u003c\/li\u003e\n\u003cli\u003eCertification: NMMA FC-W®\u003c\/li\u003e\n\u003cli\u003eAPI service: SL\u003c\/li\u003e\n\u003cli\u003eApplication: 4-stroke inboard and sterndrive marine engines, with or without emission catalyst systems\u003c\/li\u003e\n\u003cli\u003eSize: 55 US gallons (208L)\u003c\/li\u003e\n\u003cli\u003ePart number: 9440CAT7\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e The 55-gallon drum is the right format for marina service departments, marine dealerships, and commercial operations performing back-to-back 4-stroke inboard and sterndrive oil changes at volume. Bulk dispensing from a drum significantly reduces per-litre cost and eliminates the handling and disposal of individual containers. This is a high-throughput product — if you’re servicing a fleet of MerCruiser, Volvo Penta, or similar sterndrive-equipped boats on a regular schedule, the drum format pays for itself quickly. For smaller-volume needs or individual engine services, the \u003ca href=\"\/products\/11120080125988\"\u003eSierra Synthetic Blend 4-Stroke Marine Engine Oil, 25W40 FC-W, 5 Qt. – 9440CAT4\u003c\/a\u003e is the same formulation in a more manageable size. To complete the service, pair with a compatible \u003ca href=\"\/products\/11120074588196\"\u003eSierra 4-Cycle Outboard Oil Filter\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCompatibility note:\u003c\/strong\u003e Always verify your engine manufacturer’s oil specification — viscosity grade, FC-W certification requirement, and API service category — before use. Not all 4-stroke marine engines specify 25W40; confirm your engine’s requirement in the service manual.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199660359716,"sku":"47-9440CAT7","price":3773.79,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-9440CAT7.jpg?v=1785611258","url":"https:\/\/marisolmarine.com\/products\/sierra-synthetic-blend-4-stroke-marine-engine-oil-25w40-fcw-55-gallon-drum-9440cat7","provider":"Marisol Marine Company","version":"1.0","type":"link"}