{"product_id":"sierra-1894402-25w40-fcw-synthetic-blend-inboard-sterndrive-engine-oil-qt","title":"Sierra 1894402 25W-40 FC-W Synthetic Blend Inboard\/Sterndrive Engine Oil – 1 Qt.","description":"\u003ch2\u003eSierra 1894402 25W-40 FC-W Synthetic Blend Inboard\/Sterndrive Engine Oil – 1 Qt.\u003c\/h2\u003e\u003cp\u003eA 1-quart bottle of Sierra’s 25W-40 synthetic blend engine oil, purpose-formulated for sterndrive and inboard gasoline engines. Meeting \u003cstrong\u003eNMMA FC-W\u003c\/strong\u003e certification, this oil is blended from premium synthetic and mineral base stocks with an additive package engineered to handle the sustained high-RPM loads, elevated temperatures, and corrosive conditions that inboard and sterndrive engines operate in.\u003c\/p\u003e\u003cp\u003eThe synthetic blend base maintains a stable viscosity film under thermal stress, while corrosion inhibitors protect cylinder walls, bearings, and valve train components from moisture and oxidation. Friction modifiers reduce wear during cold starts and extended high-load running.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1894402\u003c\/li\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine type:\u003c\/strong\u003e 4-cycle inboard and sterndrive (I\/O) gasoline engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolume:\u003c\/strong\u003e 1 US quart (~946 mL)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase:\u003c\/strong\u003e Synthetic blend\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 kg (2.0 lb)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e The quart is the right format for topping up oil between services, carrying a spare aboard, or completing a partial oil change on a smaller-capacity inboard or sterndrive engine. It’s also a practical way to top up after checking the dipstick mid-season without opening a larger container. For a full oil change on most inboard and sterndrive engines — which typically require 4–5 quarts — the \u003ca href=\"\/products\/sierra-1894404-25w40-fcw-synthetic-blend-inboard-sterndrive-engine-oil-5-qt\"\u003eSierra 1894404 25W-40 FC-W I\/O Oil – 5 Qt.\u003c\/a\u003e is the more efficient choice. High-volume shop and fleet users should consider the \u003ca href=\"\/products\/sierra-94407-25w-40-fcw-synthetic-blend-i-o-engine-oil-55-gal-drum\"\u003eSierra 94407 25W-40 FC-W I\/O Oil – 55 Gal. Drum\u003c\/a\u003e for the best per-litre value. Always verify your engine manufacturer’s oil specification and capacity before servicing.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199652036644,"sku":"47-1894402","price":24.29,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-94402.jpg?v=1785611189","url":"https:\/\/marisolmarine.com\/products\/sierra-1894402-25w40-fcw-synthetic-blend-inboard-sterndrive-engine-oil-qt","provider":"Marisol Marine Company","version":"1.0","type":"link"}