{"product_id":"quicksilver-mercruiser-high-performance-oil-filter-858004q-for-4-5l-6-2l-engines-synthetic-media-anti-drain-valve","title":"Quicksilver MerCruiser High-Performance Oil Filter 858004Q for 4.5L \u0026 6.2L Engines — Synthetic Media, Anti-Drain Valve","description":"\u003cp\u003e\u003cstrong\u003eThe Quicksilver 858004Q is a high-performance replacement oil filter designed specifically for MerCruiser sterndrive and compatible inboard engines, delivering improved contaminant removal and reliable start-up lubrication.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt to meet Mercury Marine original equipment specifications, this Quicksilver oil filter is engineered for marine duty where salt, vibration and heavy engine loads demand robust filtration. It replaces the factory element on many General Motors-built MerCruiser sterndrive and inboard engines (and fits Mercury Marine 4.5L and 6.2L units), providing a durable, corrosion-resistant housing and advanced synthetic filter media for cleaner oil and longer engine life.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this filter improve oil cleanliness on a boat engine?\u003c\/h3\u003e\n\u003cp\u003eThe 858004Q uses a superior synthetic filter media designed to trap and hold a very high percentage of particulates, helping keep oil passages and bearings cleaner between service intervals. Cleaner oil reduces wear from abrasive contaminants and supports consistent oil pressure under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-efficiency synthetic media that removes up to 97% of oil contaminants\u003c\/li\u003e\n  \u003cli\u003eDeep-pleat construction to increase dirt-holding capacity\u003c\/li\u003e\n  \u003cli\u003eStable performance in marine temperature and vibration conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this filter prevent oil loss and dry starts?\u003c\/h3\u003e\n\u003cp\u003eThis Quicksilver element includes an anti-drain back valve that holds oil in the filter when the engine is off, ensuring immediate lubrication at start-up and helping avoid metal-to-metal contact during those critical first rotations. It helps protect bearings and cam surfaces by maintaining oil where it's needed before the pump builds full pressure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIntegrated anti-drain back valve for instant oil supply on start\u003c\/li\u003e\n  \u003cli\u003eReduces wear during repeated stop\/start cycles typical on boats\u003c\/li\u003e\n  \u003cli\u003eReliable operation across a range of marine mounting angles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow rugged is the filter housing and how does it cope with marine environments?\u003c\/h3\u003e\n\u003cp\u003eThe 858004Q features a shell that is roughly 50% thicker than conventional filters, finished with corrosion-resistant coating to stand up to saltwater exposure and onboard humidity. The reinforced metal shell resists denting and deformation from impacts and pressure fluctuations common in marine service.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThicker metal shell for improved crush resistance\u003c\/li\u003e\n  \u003cli\u003eCorrosion-resistant finish for longer life in wet environments\u003c\/li\u003e\n  \u003cli\u003eManufactured to Mercury Marine OEM specifications for fit and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich engines and applications are compatible with this Quicksilver filter?\u003c\/h3\u003e\n\u003cp\u003eThis element is a direct replacement for MerCruiser sterndrive and inboard engines built by General Motors (excluding V6 engines with block-mounted filters) and also fits Mercury Marine 4.5L and 6.2L models. It’s intended for owners seeking an OEM-grade replacement that matches factory performance and service intervals.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits MerCruiser GM-built sterndrive and inboard engines (not V6 block-mounted filters)\u003c\/li\u003e\n  \u003cli\u003eCompatible with Mercury Marine 4.5L and 6.2L engines\u003c\/li\u003e\n  \u003cli\u003eProduced to Mercury Marine OEM standards for proper fit and protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Quicksilver 858004Q is aimed at recreational and professional boat owners, marine technicians and fleet operators who need a durable, OEM-quality oil filter for MerCruiser and compatible inboard engines. If you value high contaminant capture, anti-drain protection at startup, and a corrosion-resistant housing matched to factory specifications, this filter is a reliable choice for routine maintenance and extended engine protection.\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 filter compatible with all MerCruiser engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It fits MerCruiser sterndrive and inboard engines built by GM, excluding V6 engines with block-mounted filters; also fits Mercury 4.5L and 6.2L.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How does the anti-drain back valve help my engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The valve retains oil in the filter when off, providing immediate lubrication at startup to reduce wear from dry starts.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":67591648280761,"sku":"B001HBN38M","price":69.21,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/quicksilver-858004q-front-view.jpg?v=1790556861","url":"https:\/\/redleafauto.ca\/products\/quicksilver-mercruiser-high-performance-oil-filter-858004q-for-4-5l-6-2l-engines-synthetic-media-anti-drain-valve","provider":"Redleaf Auto","version":"1.0","type":"link"}