{"product_id":"sierra-25w-40-fc-w-4-stroke-marine-stern-drive-oil-available-in-quart-and-5-quart-sizes","title":"Sierra 25W-40 FC-W Stern Drive Oil - Available in Quart and 5 Quart","description":"\u003cp\u003eSierra 25W-40 FC-W 4-Stroke Stern Drive Oil is a marine-specific engine oil developed for the high load and running stresses that stern drive and inboard engines experience on the water. Standard automotive 4-cycle oils are formulated for a very different duty cycle, so Sierra built this oil specifically for the marine environment, where it outperforms typical automotive oils in protecting hard-working stern drive and inboard powerheads.\u003c\/p\u003e\u003cp\u003eThe 25W-40 blend offers strong detergency, anti-oxidants, and anti-wear additives, along with corrosion protection that helps guard internal engine components during storage and use in a marine environment. It also delivers excellent low-temperature operating properties for reliable startup and circulation in cooler conditions. The oil is NMMA FC-W Certified and meets or exceeds API SJ, CF-4, and CH-4 performance standards, and is recommended for use in Mercruiser and OMC stern drive and inboard engines.\u003c\/p\u003e\u003cp\u003eThis oil is sold as a product line available in two container sizes so you can buy the right quantity for a single oil change or stock up for multiple services.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-9400\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Stern Drive Motor Oil\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 Certified; meets or exceeds API SJ, CF-4, CH-4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Use:\u003c\/strong\u003e Mercruiser and OMC stern drive and inboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContainer Type:\u003c\/strong\u003e Bottle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicle Service Type:\u003c\/strong\u003e Boat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e Quart (32 Fluid Ounces), 5 Quart (160 Fluid Ounces)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Equivalent Part Number:\u003c\/strong\u003e MERCURY MARINE 92-857389A1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Manufacture:\u003c\/strong\u003e Made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSizes \u0026amp; Options\u003c\/h3\u003e\u003cp\u003eChoose the Quart size for a single top-off or partial oil change, or the 5 Quart size if your engine's sump capacity requires more volume or you want to keep extra oil on hand for future changes. Both sizes contain the identical 25W-40 FC-W formulation; only the container volume differs.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat viscosity is Sierra 25W-40 FC-W Stern Drive Oil?\u003c\/strong\u003e It is a 25W-40 viscosity blend, formulated specifically for marine stern drive and inboard engines rather than automotive use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this oil certified for marine engines?\u003c\/strong\u003e Yes, Sierra 18-9400 is NMMA FC-W Certified and meets or exceeds API SJ, CF-4, and CH-4 performance standards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines is Sierra 18-9400 recommended for?\u003c\/strong\u003e It is recommended for use in Mercruiser and OMC stern drive and inboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat sizes does this oil come in?\u003c\/strong\u003e Sierra 25W-40 FC-W Stern Drive Oil is available in a Quart (32 fluid ounces) bottle and a 5 Quart (160 fluid ounces) container, both part of the 18-9400 line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know which size to order?\u003c\/strong\u003e Order the Quart size for a single top-off or a partial oil change, and the 5 Quart size if your engine's oil change requires a larger volume or you want extra on hand; both sizes are the same 25W-40 FC-W formula.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs there an OEM equivalent part number for this oil?\u003c\/strong\u003e Yes, Sierra 18-9400 25W-40 FC-W oil has an OEM equivalent part number of MERCURY MARINE 92-857389A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this oil be used in automotive engines instead of a standard 4-cycle automotive oil?\u003c\/strong\u003e This oil is developed for the marine environment and stern drive\/inboard duty cycles; it is intended to outperform standard 4-cycle automotive oils in that application rather than serve as a substitute for automotive-specified oils.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra 25W-40 FC-W oil provide corrosion protection?\u003c\/strong\u003e Yes, the formulation includes corrosion protection additives along with detergency and anti-wear properties to protect internal engine components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does this oil perform in cold conditions?\u003c\/strong\u003e Sierra 18-9400 25W-40 FC-W oil has excellent low-temperature operating properties for reliable performance in cooler conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is this oil made?\u003c\/strong\u003e Sierra 25W-40 FC-W Stern Drive Oil is made in the USA.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat container does the oil come in?\u003c\/strong\u003e Both the Quart and 5 Quart sizes of Sierra 18-9400 oil are packaged in bottle containers.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Quart","offer_id":48988057895131,"sku":"SIE-18-9400-2","price":11.77,"currency_code":"USD","in_stock":true},{"title":"5 Quart","offer_id":48988057927899,"sku":"SIE-18-9400-4","price":52.85,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/118-9400-2__18889.1753840709.500.750.jpg?v=1785189204","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-25w-40-fc-w-4-stroke-marine-stern-drive-oil-available-in-quart-and-5-quart-sizes","provider":"Good Vibes Marina","version":"1.0","type":"link"}