{"product_id":"sierra-25w40-fcw-catalyst-compatible-4-stroke-marine-engine-oil-55-gal-drum","title":"Sierra 25W-40 FC-W Catalyst Compatible 4-Stroke Marine Engine Oil – 55 Gal Drum","description":"\u003ch2\u003eSierra 25W-40 FC-W Catalyst Compatible 4-Stroke Marine Engine Oil – 55 Gal Drum\u003c\/h2\u003e\n\u003cp\u003eDesigned for modern four-stroke marine engines — with or without emission catalyst systems — this 25W-40 engine oil meets NMMA FC-W Catalyst Compatible certification requirements. It's built for the demanding operational and environmental conditions that recreational and commercial marine engines face: extended hours, temperature swings, humidity, and saltwater exposure.\u003c\/p\u003e\n\u003cp\u003eThe 55-gallon drum format is ideal for marinas, service shops, and fleet operators who perform high-volume oil changes and want consistent, professional-grade protection across every engine they service.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNMMA FC-W Catalyst Compatible — safe for use in engines with or without emission catalyst systems\u003c\/li\u003e\n\u003cli\u003eIndustry-leading wear protection and deposit control for long engine life\u003c\/li\u003e\n\u003cli\u003eEnhanced detergent and dispersant properties prevent sludge formation\u003c\/li\u003e\n\u003cli\u003eMinimizes internal engine corrosion in freshwater and saltwater environments\u003c\/li\u003e\n\u003cli\u003eReduces engine friction for improved efficiency\u003c\/li\u003e\n\u003cli\u003ePremium base stocks resist thermal and oxidative breakdown under sustained load\u003c\/li\u003e\n\u003cli\u003eHighly shear-stable viscosity prevents excessive thinning at operating temperature\u003c\/li\u003e\n\u003cli\u003eAdvanced ZDDP anti-wear additive technology protects against phosphorus depletion and extends catalyst life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eViscosity:\u003c\/strong\u003e 25W-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e NMMA FC-W Catalyst Compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolume:\u003c\/strong\u003e 55 Gallons (drum)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Type:\u003c\/strong\u003e 4-Stroke (gasoline inboard \u0026amp; sterndrive)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Inboard \u0026amp; Sterndrive engines with or without catalyst systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-synthetic-blend-4-stroke-marine-engine-oil-25w40-fc-w-1-qt-9440cat2\"\u003eSierra Synthetic Blend 25W-40 FC-W Marine Engine Oil – 1 Qt\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-synthetic-blend-4-stroke-marine-engine-oil-25w40-fc-w-55-gallon-drum-9440cat7\"\u003eSierra Synthetic Blend 25W-40 FC-W Marine Engine Oil – 55 Gal Drum\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-synthetic-blend-10w30-fc-w-4-stroke-outboard-engine-oil-1-qt-9421cat2\"\u003eSierra Synthetic Blend 10W-30 FC-W Outboard Engine Oil – 1 Qt\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003eThe 55-gallon drum is the right format for marinas, boat dealerships, and service facilities doing volume engine oil changes — not a typical single-boat purchase. If you're servicing your own vessel, the \u003ca href=\"\/products\/sierra-synthetic-blend-4-stroke-marine-engine-oil-25w40-fc-w-1-qt-9440cat2\"\u003e1-quart\u003c\/a\u003e format is the practical choice. The 25W-40 FC-W Catalyst Compatible spec is particularly important for newer sterndrive and inboard engines (MerCruiser, Volvo Penta) that use catalytic converter systems — using a non-catalyst-compatible oil in these engines can damage the catalyst over time. If your engine manual specifies FC-W Catalyst Compatible, this is the correct oil. Always verify your engine's oil specification before ordering in bulk.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199659704356,"sku":"47-9400CAT7","price":3511.19,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-9400CAT7.jpg?v=1785611243","url":"https:\/\/marisolmarine.com\/products\/sierra-25w40-fcw-catalyst-compatible-4-stroke-marine-engine-oil-55-gal-drum","provider":"Marisol Marine Company","version":"1.0","type":"link"}