--- product_id: 409164824 title: "85W-90 Extreme Performance Gear Lube" brand: "quicksilver" price: "£95.34" currency: GBP in_stock: true reviews_count: 9 category: "Quicksilver" url: https://www.desertcart.co.uk/products/409164824-85w-90-extreme-performance-gear-lube store_origin: GB region: United Kingdom --- # Advanced emulsifiers guard against water intrusion High-temp stability prevents horsepower loss 85W-90 viscosity for extreme gear protection 85W-90 Extreme Performance Gear Lube **Brand:** quicksilver **Price:** £95.34 **Availability:** ✅ In Stock ## Summary > ⚙️ Dominate the race with gear lube engineered to outperform and outlast! ## Quick Answers - **What is this?** 85W-90 Extreme Performance Gear Lube by quicksilver - **How much does it cost?** £95.34 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/409164824-85w-90-extreme-performance-gear-lube) ## Best For - quicksilver enthusiasts ## Why This Product - Trusted quicksilver brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Tested by the Best:** Developed and validated by Mercury Marine to meet OEM specs, ensuring peak marine engine performance. - • **Race-Ready Viscosity:** Precision 85W-90 formula engineered for outboard and sterndrive racing performance. - • **Unmatched Wear Defense:** Tackifiers and pressure additives create a resilient oil film that fights excessive wear under extreme conditions. - • **Water-Resistant Gear Shield:** Advanced emulsifiers protect your gears even if water breaches the housing—no compromises on durability. - • **Annual Maintenance Made Simple:** Optimized for yearly changes or every 100 hours, keeping your high-performance gearcases in race-ready condition. ## Overview Quicksilver’s 85W-90 Extreme Performance Gear Lube is a premium marine-grade lubricant designed specifically for high-stress outboard and sterndrive racing applications. Featuring advanced tackifiers and emulsifiers, it maximizes wear protection, maintains horsepower by resisting breakdown at high temperatures, and safeguards gears against water intrusion. Developed to Mercury Marine’s stringent OEM standards, this gear lube ensures your marine, powersports, and motorsports gearcases operate at peak performance with reliable annual maintenance. ## Description Extreme Performance Gear Lube 8M011679 is 85W90 weight for use in outboard and stern drive racing applications. Also for use in high‑performance gear cases used in marine, powersports, and motorsports applications. Provides maximum protection against wear. Its tackifiers and pressure additives improve oil film adhesion and protect against excessive wear. Helps prevent horsepower loss and won’t break down when gears reach high temperatures. Advanced emulsifiers protect gears if water enters the gear housing. Should be changed once each year when winterizing the engine or every 100 hours of operation. The Quicksilver brand is the leader in delivering uncompromising engine oils, parts and accessories to the marine industry for over 65 years. Quicksilver is the premier supplier of Mercury Marine Original Equipment replacement engine parts, oils, and accessories, but also works to serve all Original Equipment brands in the marine and powersports industries. It has earned a loyal following by providing the highest quality products that are tested through some of the most rigorous environments and testing procedures. No aftermarket company comes close to the level of research and design as Quicksilver; buying Quicksilver is buying performance, protection and peace of mind. Review: Great product - Exactly what I was looking for Review: Finally a better option from Merc! - Extreme Perf lube is Merc's answer to finally have a decent product to protect Bravo 3 outdrives. Their previous "high perf" lube wasn't up the the heat/pressure generated by the B3. Here's hoping they don't cheap out again! ## Features - Designed for outboard and sterndrive racing application - Also for use in high‑performance gear cases used in marine, powersports, and motorsports applications - Provides maximum protection against wear - Its tackifiers and pressure additives improve oil film adhesion and protect against excessive wear - Advanced emulsifiers protect gears if water enters the gear housing - Developed & tested by Mercury Marine to our stringent original equipment manufacturer specifications to maximize the performance of your marine engine ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07TTLNLYG | | Best Sellers Rank | #25,592 in Automotive ( See Top 100 in Automotive ) #53 in Gear Oils | | Brand | Quicksilver | | Brand Name | Quicksilver | | Container Type | Bottle | | Customer Reviews | 4.8 out of 5 stars 195 Reviews | | Global Trade Identification Number | 00745061959583 | | Included Components | End Product & Information | | Item Form | Oil | | Item Weight | 7 Pounds | | Liquid Volume | 1 Gallons | | Manufacturer | Quicksilver | | Material | Various Materials | | Model Number | 8M0111679 | | Number of Items | 1 | | Package Information | Bottle | | Part Number | 8M0111679 | | Recommended Uses For Product | Lube | | Specific Uses For Product | outboard and sterndrive racing, high-performance gearcases in marine, powersports, and motorsports applications, protection against wear, protection against water intrusion in gear housings | | UPC | 745061959583 | | Unit Count | 128.0 Fluid Ounces | | Viscosity | 85W-90 | ## Product Details - **Brand:** Quicksilver - **Item Weight:** 7 Pounds - **Liquid Volume:** 1 Gallons - **Material:** Various Materials - **Package Information:** Bottle ## Images ![85W-90 Extreme Performance Gear Lube - Image 1](https://m.media-amazon.com/images/I/6119azn6YvL.jpg) ![85W-90 Extreme Performance Gear Lube - Image 2](https://m.media-amazon.com/images/I/81Gj4NAR9HL.jpg) ![85W-90 Extreme Performance Gear Lube - Image 3](https://m.media-amazon.com/images/I/81GjMNmzk+L.jpg) ![85W-90 Extreme Performance Gear Lube - Image 4](https://m.media-amazon.com/images/I/81ssfPaqxfL.jpg) ![85W-90 Extreme Performance Gear Lube - Image 5](https://m.media-amazon.com/images/I/81KihxBiHLL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Is this oil GL4?** A: Hello! GL-4 is a multipurpose, extreme-pressure, API GL-4 automotive gear lubricant which isn't a ranking for our oils. Thank you, Quciksilver Support Team **Q: Is this oil g5 rated** A: Yes **Q: Can i use it for mercury fourstroke 150hp efi?** A: This oil is for the outdrive not the motor. **Q: what color is this oil ?** A: Brown ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product *by S***T on August 2, 2025* Exactly what I was looking for ### ⭐⭐⭐⭐⭐ Finally a better option from Merc! *by B***L on October 24, 2025* Extreme Perf lube is Merc's answer to finally have a decent product to protect Bravo 3 outdrives. Their previous "high perf" lube wasn't up the the heat/pressure generated by the B3. Here's hoping they don't cheap out again! ### ⭐⭐⭐⭐⭐ High quality product at a much more reasonable price than the Mercury name brand. *by J***E on May 10, 2024* A week before launching our boat I noticed the outdrive lube was a little low. Having this delivered so quickly and being able to get it at such a better price than the Mercury brand was really nice. ## Frequently Bought Together - Quicksilver 85W-90 Extreme Performance Gear Lube - Quicksilver by Mercury Marine 25W-40 Marine Engine Oil - Slippery Pete - Lower Unit Gear Oil Pump for Standard Quart Bottles, Includes 3/8 inch Metal Swivel, 8mm and 10mm Adapters Fit Most Marine Boat Outboard Motors (NOT COMPATIBLE WITH VOLVO PENTA) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/409164824-85w-90-extreme-performance-gear-lube](https://www.desertcart.co.uk/products/409164824-85w-90-extreme-performance-gear-lube) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-19*