{"product_id":"quicksilver-25w-40-4-stroke-marine-engine-oil-1-gallon-fc-w-rated-for-outboards-sterndrives","title":"Quicksilver 25W-40 4‑Stroke Marine Engine Oil - 1 Gallon, FC‑W Rated for Outboards \u0026 Sterndrives","description":"\u003cp\u003e\u003cstrong\u003eQuicksilver 25W-40 4-Stroke Marine Engine Oil is a full‑sized, marine‑spec lubricant engineered to protect sterndrive and outboard 4‑stroke engines under high‑RPM and corrosive saltwater conditions.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eKeeping engine oil clean and suited to marine demands is essential for long service life and reliable performance. This Quicksilver 1‑gallon formula meets and exceeds marine 4‑stroke standards, including FC‑W and catalyst compatibility, and is developed to match Mercury Marine equipment specifications. The result is a single product designed to resist corrosion, minimize internal wear, and support high‑rpm outboard operation.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this oil protect engines used in saltwater environments?\u003c\/h3\u003e\n\u003cp\u003eThis Quicksilver blend includes additives tailored to reduce corrosive attack on metal surfaces and to keep internal parts lubricated under marine conditions. It forms a resilient protective film that shields components during idle and high‑load operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrosion inhibitors formulated for marine exposure\u003c\/li\u003e\n  \u003cli\u003eAnti‑wear additives that preserve bearings and cam lobes\u003c\/li\u003e\n  \u003cli\u003eStable additives that resist breakdown from heat and humidity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it work with my Mercury Marine outboard or sterndrive?\u003c\/h3\u003e\n\u003cp\u003eYes—this oil is produced to meet Mercury Marine OEM specifications and serves as a direct replacement for Mercury part 8M0078628. It’s compatible with most 4‑stroke outboards and sterndrives that require 25W‑40 viscosity and FC‑W level protection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect replacement for Mercury Marine 8M0078628\u003c\/li\u003e\n  \u003cli\u003eMeets Mercury Marine original equipment requirements\u003c\/li\u003e\n  \u003cli\u003eSuitable for many 4‑stroke outboards and sterndrives\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance benefits does 25W‑40 viscosity deliver for high‑RPM motors?\u003c\/h3\u003e\n\u003cp\u003eThe 25W‑40 grade balances cold‑start flow with high‑temperature film strength, helping engines maintain oil pressure and reduce metal‑to‑metal contact at elevated RPMs. Special viscosity modifiers help the oil stay within optimal thickness across a wide temperature range, supporting consistent lubrication during varied operating conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOptimized film strength at high operating temperatures\u003c\/li\u003e\n  \u003cli\u003eViscosity modifiers to support stable oil thickness under load\u003c\/li\u003e\n  \u003cli\u003eEnhanced protection during sustained high‑RPM runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does using Quicksilver oil simplify maintenance and parts compatibility?\u003c\/h3\u003e\n\u003cp\u003eChoosing Quicksilver helps streamline upkeep because the formula is designed and tested alongside Mercury equipment and other marine systems. That alignment reduces the risk of compatibility issues with seals, catalysts, and engine components while simplifying parts sourcing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eManufacturer part number 8M0078620 for easy identification\u003c\/li\u003e\n  \u003cli\u003eFC‑W and catalyst compatibility minimizes system conflicts\u003c\/li\u003e\n  \u003cli\u003eFormulation tested for common marine service conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Boaters and marine technicians who demand OEM‑level lubrication for 4‑stroke outboards and sterndrives will benefit from Quicksilver 25W‑40. It’s suited to owners of Mercury Marine equipment looking for a direct replacement, as well as operators of other marine brands who need a durable, corrosion‑resistant oil engineered for high‑RPM performance and long‑term reliability.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this oil compatible with catalyst-equipped marine engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The Quicksilver 25W‑40 is FC‑W and catalyst compatible, formulated to work with catalyst systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this replace Mercury part 8M0078628?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This product is a direct replacement for Mercury Marine part 8M0078628 and is produced to OEM specs.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":48080918085790,"sku":"B00N6DF8SW","price":66.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/quicksilver-25w40-gallon-front-label.jpg?v=1785792358","url":"https:\/\/northtrailauto.ca\/products\/quicksilver-25w-40-4-stroke-marine-engine-oil-1-gallon-fc-w-rated-for-outboards-sterndrives","provider":"North Trail Auto","version":"1.0","type":"link"}