{"product_id":"sierra-25w40-fcw-catalyst-compatible-4-stroke-marine-engine-oil-5-qt","title":"Sierra 25W-40 FC-W Catalyst Compatible 4-Stroke Marine Engine Oil – 5 Qt","description":"\u003ch2\u003eSierra 25W-40 FC-W Catalyst Compatible 4-Stroke Marine Engine Oil – 5 Qt\u003c\/h2\u003e\n\u003cp\u003eThe 5-quart jug is the practical choice for a full inboard or sterndrive oil change — enough volume to complete most single-engine services without leftover waste. This 25W-40 oil meets NMMA FC-W Catalyst Compatible certification, making it safe for use in modern four-stroke marine engines with or without emission catalyst systems.\u003c\/p\u003e\n\u003cp\u003eBuilt on premium base stocks with an advanced additive package, it delivers the wear protection, corrosion resistance, and thermal stability that inboard and sterndrive engines demand across a full season of use.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNMMA FC-W Catalyst Compatible — safe for 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 5 Quarts\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-25w40-fcw-catalyst-compatible-4-stroke-marine-engine-oil-55-gal-drum\"\u003eSierra 25W-40 FC-W Catalyst Compatible Marine Engine Oil – 55 Gal Drum\u003c\/a\u003e\u003c\/li\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 5-quart size is the sweet spot for a single inboard or sterndrive oil change — most MerCruiser and Volvo Penta engines take between 4 and 6 quarts, so this covers the majority of services with minimal waste. If you're doing multiple engines or want to stock up for the season, the \u003ca href=\"\/products\/sierra-25w40-fcw-catalyst-compatible-4-stroke-marine-engine-oil-55-gal-drum\"\u003e55-gallon drum\u003c\/a\u003e is available for volume purchasing. The FC-W Catalyst Compatible spec matters if your engine has a catalytic converter — common on newer MerCruiser and Volvo Penta sterndrives. Using a non-catalyst-compatible oil in these engines can degrade the catalyst over time. Always confirm your engine's oil specification in the owner's manual before purchasing.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199659671588,"sku":"47-9400CAT4","price":101.79,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-9400CAT4.jpg?v=1785611243","url":"https:\/\/marisolmarine.com\/products\/sierra-25w40-fcw-catalyst-compatible-4-stroke-marine-engine-oil-5-qt","provider":"Marisol Marine Company","version":"1.0","type":"link"}