{"product_id":"quicksilver-sae-90-gear-lube-2-5-gallon-marine-lower-unit-oil","title":"Quicksilver SAE 90 Gear Lube 2.5 Gallon - Marine Lower Unit Oil","description":"\u003cp\u003eIn this review the Quicksilver High Performance SAE 90 Gear Lube is evaluated as a purpose-built lower unit oil for sterndrives and outboards above 75hp. The bottom line: this 2.5 gallon container is aimed at boat owners and marine technicians who need a direct replacement for Mercury Marine parts and long-term corrosion protection. The reviewer found it especially valuable for preventing wear and damage when water intrusion is a concern and for meeting Mercury Marine original equipment specifications for reliable service life.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eDirect replacement:\u003c\/strong\u003e Formulated to serve as a direct replacement for Mercury Marine 858065K01, simplifying maintenance with OEM-compatible fluid.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCorrosion protection:\u003c\/strong\u003e Additives are designed to protect internal components from corrosion when seawater or moisture is present in the gear housing.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eWear reduction:\u003c\/strong\u003e Extreme pressure synthetic additives help prevent metal-to-metal contact and reduce gear wear under load.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eApplication specific:\u003c\/strong\u003e Engineered for lower unit and sterndrive applications on outboards and sterndrives above 75hp where SAE 90 viscosity is specified.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eManufacturer backed:\u003c\/strong\u003e Produced to meet Mercury Marine original equipment manufacturer specifications for consistent compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis oil is best for boat owners, marine service shops, and anyone maintaining Mercury outboards or MerCruiser sterndrives where the manufacturer calls for SAE 90 gear lube. The 2.5 gallon size suits frequent maintenance or operators who service multiple vessels.\u003c\/p\u003e\n\u003cp\u003eThose with smaller craft that require different viscosity gear oils or owners who need multi-viscosity convenience should look elsewhere, but if you need a straightforward OEM-style replacement with corrosion and wear protection, this product fits well.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eMeets Mercury Marine OEM specifications, making it a reliable direct replacement for specified parts.\u003c\/li\u003e\n \u003cli\u003eFormulated to resist corrosion and help prevent failures from water intrusion in the gear housing.\u003c\/li\u003e\n \u003cli\u003eContains extreme pressure synthetic additives to protect gears from metal-to-metal contact under heavy load.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eSAE 90 is a single viscosity; customers needing multi-viscosity or different grades must confirm compatibility first.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eQuicksilver High Performance SAE 90 Gear Lube\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e2.5 gallon\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eViscosity\u003c\/td\u003e\n\u003ctd\u003eSAE 90\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eOutboard lower unit and MerCruiser sterndrive above 75hp\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eOEM compatibility\u003c\/td\u003e\n\u003ctd\u003eDirect replacement for Mercury Marine 858065K01\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eManufacturer part no.\u003c\/td\u003e\n\u003ctd\u003e8M0222073 (previous 858065Q01)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eQuicksilver SAE 90 Gear Lube is a solid, no-nonsense choice for owners and technicians who need an OEM-compatible lower unit oil with strong corrosion and wear protection. The 2.5 gallon size offers good value for regular maintenance or multiple boats, and the formula's focus on preventing damage from water intrusion makes it worth choosing when Mercury Marine specifications are called for.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this replace Mercury 858065K01?\u003c\/strong\u003e\u003cbr\u003eYes, it is formulated as a direct replacement for Mercury Marine 858065K01 and meets OEM specifications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this suitable for freshwater and saltwater use?\u003c\/strong\u003e\u003cbr\u003eYes, the formulation includes corrosion protection intended to help prevent damage whether the gear housing is exposed to fresh or saltwater.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich engines is it intended for?\u003c\/strong\u003e\u003cbr\u003eIt is designed for lower unit and sterndrive applications on outboards and MerCruiser sterndrives above 75hp that require SAE 90.\u003c\/p\u003e","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":48636073148635,"sku":"B002IV6CGA","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61uxmnbMQ6L._AC_SL1500.jpg?v=1778594134","url":"https:\/\/gearmusthave.com\/products\/quicksilver-sae-90-gear-lube-2-5-gallon-marine-lower-unit-oil","provider":"GearMustHave","version":"1.0","type":"link"}