{"product_id":"quicksilver-25w-40-4-stroke-synthetic-blend-marine-engine-oil-1-gallon-fc-w-corrosion-wear-protection","title":"Quicksilver 25W-40 4-Stroke Synthetic Blend Marine Engine Oil — 1 Gallon, FC-W Corrosion \u0026 Wear Protection","description":"\u003cp\u003e\u003cstrong\u003eQuicksilver 25W-40 4-stroke synthetic blend marine engine oil (1 gallon) is a corrosion-resistant, wear-protecting lubricant engineered for high-rpm outboards and sterndrives.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eClean, stable oil is one of the simplest ways to extend the life of marine engines. This Quicksilver formula is a synthetic blend designed specifically for 4-stroke outboards and sterndrive applications, meeting or exceeding marine industry standards including FC-W and FC-W catalyst compatibility. It’s produced to Mercury Marine original equipment specifications, making it a direct replacement for part number 8M0078630 and suitable for a wide range of recreational and commercial boats.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this oil protect my 4-stroke outboard at high RPMs?\u003c\/h3\u003e\n\u003cp\u003eThe 25W-40 viscosity and synthetic blend base deliver strong film strength under heavy loads and elevated temperatures. That reduces metal-to-metal contact and helps prevent accelerated wear during long runs or high-rev operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh viscosity retention at operating temperature for consistent lubrication\u003c\/li\u003e\n  \u003cli\u003eEnhanced wear additives to protect bearings and cam trains\u003c\/li\u003e\n  \u003cli\u003eFormulation tested for high-rpm outboard environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it prevent corrosion and compatibility issues in marine use?\u003c\/h3\u003e\n\u003cp\u003eThis oil includes corrosion inhibitors formulated for wet, salty, and humid marine environments. It’s also FC-W rated and catalyst-compatible, meaning it meets marine industry chemistry standards and avoids interference with emissions-control components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrosion-resistant additive package for internal engine protection\u003c\/li\u003e\n  \u003cli\u003eMeets FC-W and catalyst compatibility to fit marine OEM specs\u003c\/li\u003e\n  \u003cli\u003eProduced to Mercury Marine OEM requirements for application confidence\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this Quicksilver oil an exact replacement for my Mercury part?\u003c\/h3\u003e\n\u003cp\u003eYes—this product is a direct replacement for Mercury Marine part 8M0078630 and carries manufacturer part number 8M0078623. Using an OEM-matching oil simplifies service and helps preserve warranty alignment when recommended by the manufacturer.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect OEM replacement for Mercury 8M0078630\u003c\/li\u003e\n  \u003cli\u003eManufactured to Mercury Marine specifications\u003c\/li\u003e\n  \u003cli\u003eSuitable for a broad range of 4-stroke outboards and sterndrives\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use and store this 1-gallon container effectively?\u003c\/h3\u003e\n\u003cp\u003eUse the oil following your engine manufacturer’s change-interval recommendations and dispose of used oil responsibly. Store the sealed one-gallon jug in a cool, dry place away from direct sunlight to maintain additive stability and shelf life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFollow engine manual for drain intervals and fill volumes\u003c\/li\u003e\n  \u003cli\u003eKeep sealed until use; store upright in a cool, dry area\u003c\/li\u003e\n  \u003cli\u003eRecycle used oil per local environmental regulations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Boaters and marine service professionals who want a dependable, OEM-grade lubricant for 4-stroke outboards and sterndrives will benefit most from this Quicksilver 25W-40 synthetic blend. It fits owners of Mercury-equipped vessels and other brands seeking proven corrosion resistance, high-rpm protection, and compatibility with marine emissions systems. Choose this one-gallon container if you need a practical size for routine maintenance or workshop stocking, and prefer a product designed and tested specifically for rugged marine conditions.\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: Can I use this oil in all 4-stroke outboard engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes for most 4-stroke outboards and sterndrives; always check your engine manual for recommended viscosity and approvals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this oil compatible with catalytic converters and emissions systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It meets FC-W and is catalyst compatible to avoid adverse effects on emissions-control components.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":48079825272990,"sku":"B00FM9AVKI","price":91.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/quicksilver-gallon-front-label.jpg?v=1785771835","url":"https:\/\/northtrailauto.ca\/products\/quicksilver-25w-40-4-stroke-synthetic-blend-marine-engine-oil-1-gallon-fc-w-corrosion-wear-protection","provider":"North Trail Auto","version":"1.0","type":"link"}