{"product_id":"sierra-9440cat4-synthetic-blend-25w40-fcw-marine-engine-oil-5qt","title":"Sierra 9440CAT4 Synthetic Blend 25W-40 FC-W Marine Engine Oil – 5 Qt","description":"\u003ch2\u003eSierra 9440CAT4 Synthetic Blend 25W-40 FC-W Marine Engine Oil – 5 Qt\u003c\/h2\u003e\u003cp\u003eEngineered specifically for modern 4-stroke inboard and sterndrive marine engines, this synthetic blend oil delivers reliable protection whether your engine runs a catalyst-equipped exhaust system or not. The 25W-40 viscosity grade maintains a stable oil film across a wide temperature range — from cold morning starts to sustained high-RPM operation on open water.\u003c\/p\u003e\u003cp\u003eSold in 5-quart containers. Case quantities available.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNMMA FC-W® Certified and API-SL rated — meets OEM requirements for most inboard and sterndrive engines\u003c\/li\u003e\n\u003cli\u003eCatalyst-compatible formula protects emission systems from phosphorus depletion using advanced ZDDP anti-wear technology\u003c\/li\u003e\n\u003cli\u003eEnhanced detergents and dispersants keep internals clean and prevent sludge buildup\u003c\/li\u003e\n\u003cli\u003eCorrosion inhibitors protect against moisture-related damage common in marine environments\u003c\/li\u003e\n\u003cli\u003eResists viscosity breakdown under high-load, high-temperature conditions\u003c\/li\u003e\n\u003cli\u003eIndustry-leading wear protection for extended engine life\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Number: 9440CAT4 (SKU: 47-9440CAT4)\u003c\/li\u003e\n\u003cli\u003eViscosity: 25W-40\u003c\/li\u003e\n\u003cli\u003eCertification: NMMA FC-W®, API-SL\u003c\/li\u003e\n\u003cli\u003eVolume: 5 Quarts\u003c\/li\u003e\n\u003cli\u003eApplication: 4-stroke inboard and sterndrive engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e This is the go-to oil for inboard and sterndrive engines (MerCruiser, Volvo Penta, Indmar, PCM, etc.) that specify a 25W-40 FC-W rated oil — especially engines with catalytic exhaust systems where phosphorus-safe formulas are required. If you only need a single quart for a top-up, see the \u003ca href=\"\/products\/11120080093220\"\u003eSierra 9440CAT2 Synthetic Blend 25W-40 FC-W Marine Engine Oil – 1 Qt\u003c\/a\u003e. For high-volume or commercial use, the \u003ca href=\"\/products\/11120080158756\"\u003eSierra 9440CAT7 Synthetic Blend 25W-40 FC-W Marine Engine Oil – 55-Gallon Drum\u003c\/a\u003e offers the best value per litre. For outboard engines requiring 10W-30, see the \u003ca href=\"\/products\/11120080060452\"\u003eSierra 9421CAT3 Synthetic Blend 10W-30 FC-W 4-Stroke Outboard Engine Oil – 1 Gallon\u003c\/a\u003e.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199660326948,"sku":"47-9440CAT4","price":99.69,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-9440CAT4.jpg?v=1785611257","url":"https:\/\/marisolmarine.com\/products\/sierra-9440cat4-synthetic-blend-25w40-fcw-marine-engine-oil-5qt","provider":"Marisol Marine Company","version":"1.0","type":"link"}