{"product_id":"sierra-94104-full-synthetic-sae-30-4-cycle-marine-engine-oil-5-quarts","title":"Sierra 94104 Full Synthetic SAE 30 4-Cycle Marine Engine Oil, 5 Quarts","description":"\u003ch2\u003eSierra 94104 Full Synthetic SAE 30 4-Cycle Marine Engine Oil – 5 Quarts\u003c\/h2\u003e\u003cp\u003ePurpose-built for gasoline and diesel inboard and sterndrive engines, Sierra 94104 is a \u003cstrong\u003efull synthetic SAE 30 marine engine oil\u003c\/strong\u003e formulated with a special blend of synthetic base stocks and a balanced additive system that exceeds FC-W marine engine oil requirements. It delivers superior protection across the full engine lifecycle — from cold starts and hard running to long-term storage.\u003c\/p\u003e\u003cp\u003eThe 5-quart jug is the right size for a \u003cstrong\u003ecomplete oil change on most inboard and sterndrive engines\u003c\/strong\u003e, covering the typical 4–5 quart sump capacity in a single container.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull synthetic formulation\u003c\/strong\u003e — exceeds FC-W marine engine oil requirements; superior protection versus conventional and synthetic-blend oils\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStartup \u0026amp; storage protection\u003c\/strong\u003e — maintains a protective oil film on engine surfaces during cold starts and extended lay-up periods\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFriction \u0026amp; wear reduction\u003c\/strong\u003e — reduces metal-to-metal contact for extended engine life and lower operating temperatures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced oil consumption\u003c\/strong\u003e — full synthetic base resists burn-off and volatility better than conventional oils\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved fuel economy\u003c\/strong\u003e — lower internal friction translates to measurable efficiency gains over time\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasoline \u0026amp; diesel compatible\u003c\/strong\u003e — suitable for both fuel types in inboard and sterndrive applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eViscosity: SAE 30\u003c\/li\u003e\n\u003cli\u003eBase stock: Full synthetic\u003c\/li\u003e\n\u003cli\u003eCertification: FC-W (exceeds requirements)\u003c\/li\u003e\n\u003cli\u003eApplication: Gasoline and diesel inboard and sterndrive engines\u003c\/li\u003e\n\u003cli\u003eVolume: 5 US quarts (4.73 L)\u003c\/li\u003e\n\u003cli\u003ePart number: 94104 | SKU: 47-94104\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBest Use Case\u003c\/h3\u003e\u003cp\u003eThe 94104 is the ideal choice for \u003cstrong\u003einboard and sterndrive owners\u003c\/strong\u003e who want full synthetic protection for a complete seasonal oil change. The 5-quart size covers most inboard engine sump capacities in a single purchase, making it a convenient one-stop solution for DIY engine maintenance. It’s particularly well-suited for engines that sit for extended periods between uses, where the superior film retention of full synthetic oil provides meaningful protection during storage and on first start-up of the season.\u003c\/p\u003e\u003cp\u003eAlso available in a \u003ca href=\"\/products\/sierra-94102-30-wt-full-synthetic-4-cycle-marine-engine-oil-qt\"\u003e1-Quart size (94102)\u003c\/a\u003e for top-ups or smaller engine sumps. For outboard engine applications, see the \u003ca href=\"\/products\/sierra-synthetic-blend-10w30-fc-w-4-stroke-outboard-engine-oil-1-qt-9421cat2\"\u003eSierra 9421CAT2 Synthetic Blend 10W-30 FC-W (1 Qt.)\u003c\/a\u003e or the \u003ca href=\"\/products\/sierra-synthetic-blend-10w30-fc-w-4-stroke-outboard-engine-oil-1-gallon-9421cat3\"\u003eSierra 9421CAT3 Synthetic Blend 10W-30 FC-W (1 Gallon)\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eBest use case is the inboard or sterndrive owner doing a full seasonal oil change — the 5-quart jug is sized to cover most common inboard sump capacities (4–5 qt) in a single container, which is a genuine convenience selling point. Lead with the FC-W certification and full synthetic protection when positioning against conventional or synthetic-blend alternatives. Key distinction: this oil is for \u003cstrong\u003einboard and sterndrive engines only\u003c\/strong\u003e — not for outboard motors. Redirect outboard customers to the 9420 or 9421 series. The startup and storage protection benefit is a strong talking point for seasonal boaters who winterize and want peace of mind on spring commissioning. Pair with the appropriate oil filter for the customer’s engine as an add-on sell.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199659835428,"sku":"47-94104","price":73.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-94102_dee8643c-2942-4095-82c3-a703e1cc1a6c.jpg?v=1785611247","url":"https:\/\/marisolmarine.com\/products\/sierra-94104-full-synthetic-sae-30-4-cycle-marine-engine-oil-5-quarts","provider":"Marisol Marine Company","version":"1.0","type":"link"}