---
product_id: 3703752
title: "by Mercury Marine 80W-90 Premium Gear Lube, Marine Engine, 32 oz."
brand: "quicksilver"
price: "€ 47.32"
currency: EUR
in_stock: true
reviews_count: 13
category: "Quicksilver"
url: https://www.desertcart.sk/products/3703752-by-mercury-marine-80w-90-premium-gear-lube-marine-engine
store_origin: SK
region: Slovakia
---

# Water intrusion defense for marine gear cases 80W-90 viscosity for optimal gear protection Max corrosion & wear resistance additives by Mercury Marine 80W-90 Premium Gear Lube, Marine Engine, 32 oz.

**Brand:** quicksilver
**Price:** € 47.32
**Availability:** ✅ In Stock

## Summary

> 🛥️ Keep your marine engine running smooth—because your boat deserves premium protection!

## Quick Answers

- **What is this?** by Mercury Marine 80W-90 Premium Gear Lube, Marine Engine, 32 oz. by quicksilver
- **How much does it cost?** € 47.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/3703752-by-mercury-marine-80w-90-premium-gear-lube-marine-engine)

## 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

- • **Bulk Value Pack:** 32 oz bottles sold in packs of 6—stock up and never worry about your marine maintenance.
- • **OEM Trusted Quality:** Meets Mercury Marine’s exacting standards for seamless, reliable performance.
- • **Water-Resistant Formula:** Formulated to safeguard gears if water enters the lower unit, preventing costly failures.
- • **Ultimate Corrosion Shield:** Advanced additives combat rust and pitting even in harsh saltwater environments.
- • **Precision Marine Protection:** Specifically engineered for outboard motors under 75hp to extend gear life.

## Overview

Quicksilver by Mercury Marine 80W-90 Premium Gear Lube is a high-performance lubricant designed for outboard motor gear cases under 75hp. It offers superior protection against wear, corrosion, and water intrusion, meeting original equipment manufacturer specs to ensure long-lasting marine engine health. Available in convenient 32 oz bottles, this gear lube is trusted by professionals and boating enthusiasts alike for reliable, OEM-grade performance.

## Description

Clean oil is essential in reducing friction and preventing damage to internal components, providing many years of engine life. Engineered for outboard applications below 75hp, this premium 80W-90 gear lube has been extensively tested to ensure impressive protection against corrosion and wear. Specifically formulated to help prevent failures due to water entering the gear housing. 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 replacement oil, good price! - Great oil replacement for Mercury outboard. I bought this product to change the lower unit gear oil on my 3.5 HP Merc outboard and it has ran good all summer.
Review: Great product. - Great product, great price.

## Features

- Direct replacement for Mercury Marine 858058K01
- Provides maximum protection against excessive wear, corrosion and pitting for extended gear life in marine applications
- Contains additives to protect gears if water enters the gear case or lower unit
- Recommended for use in outboard motor gear cases and marine lower units in applications below 75hp
- 80W-90 viscosity
- 32 oz. bottle (pack of 6)
- Produced to meet Mercury Marine original equipment manufacturer specifications to best protect your engine

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0039001TI |
| Best Sellers Rank | #3,981 in Automotive ( See Top 100 in Automotive ) #6 in Gear Oils |
| Brand | Quicksilver |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,875) |
| Date First Available | February 18, 2010 |
| Exterior | Painted |
| Global Trade Identification Number | 00745061038912 |
| Is Discontinued By Manufacturer | No |
| Item Form | Oil |
| Item Weight | 1.8 pounds |
| Item model number | 858058Q01 |
| Liquid Volume | 5.64 Liters |
| Manufacturer | Quicksilver |
| Manufacturer Part Number | 858058Q01 |
| Material | Various Materials |
| Model | 58Q01 |
| Number of Items | 1 |
| Package Information | Bottle |
| Product Dimensions | 4 x 2.38 x 9.25 inches |
| Recommended Uses For Product | Lube |
| UPC | 745061038912 745061493735 |
| Unit Count | 32.0 Fluid Ounces |
| Viscosity | 80W-90 |

## Product Details

- **Brand:** Quicksilver
- **Item Weight:** 1.8 Pounds
- **Liquid Volume:** 5.64 Liters
- **Material:** Various Materials
- **Package Information:** Bottle

## Images

![by Mercury Marine 80W-90 Premium Gear Lube, Marine Engine, 32 oz. - Image 1](https://m.media-amazon.com/images/I/71ofQ3DHvZL.jpg)

## Available Options

This product comes in different **Pattern, Size** options.

## Questions & Answers

**Q: Is this GL4 or GL5? Is it suitable for a scooter rear hub? Vespa advises GL4 only for rear hub.  Thanks**
A: Hi, I Don't think it is suitable for scooter rear hub.

**Q: I have a 2000 mercury 175 outboard what do I need to change my lower unit oil?**
A: You need •(1) High performance mercury gear lube Quart 32oz.(it's blue)..•(2)lower unit fluid pump(Get a decent one).•(3) Buy replacement lower unit fill/vent washers. (mercury s are blue and flat,but they might use o-rings on motors now.not sure)Remove the cap on the gear lube and slide the pick-up tube from the gear lube pump into the quart.go slow so you dont spill.then screw that onto the quart of gear lube  .it will screw on the threads where the cap was removed(That way you can leave it on until you need to use aagain).Lower the lower unit down and level.doesnt have to be perfect.Now using Med flat head screwdriver remove the bottom drain screw. (Make sure you have a catch pan for old fluid to drain.)when you remove the bottom drain screw check that you remove the washer.normally it is on the screw but it can also get stuck on the screw hole.clean off metal particles on the magnetic part of the screw.clean it off.put new washer/o-ring on it and put to side.Now remove the top screw(vent screw) and the gear lube should start coming out much faster.find old gasket/o-ring,clean off screw and put new gasket/oring on it and put to the side.Now screw the tip of the fill hose into the fill hole(the bottom screw).now,pump,pump,pump until you start seeing the blue gear lube coming out of the top screw hole (vent hole).once gear lube starts coming out,stop and put your vent screw back into lower unit.now get your fill screw ready with washer on it ,unscrew the fill tip and as soon as you pull the fill hose away.... immediately put your fill screw in the hole and hand tighten as far as you can.then using your flathead tighten it up,and then tighten up the top vent screw.leave pump installed on the quart of hearlube and put up for next year.wipe down lower unit,dispose of old gear lube,and after your done go back and double check the tightness of both screws.
Side note: if when changing gear lube the old lube as it drains smells like burnt almonds.Change it out again in 3 months.Then you can get back on a once a year lube service.when old lube smells like that it means it was in too long and burnt/broke down.so you want to change it out again sooner than normal service just to be sure you get all that old contaminated fluid  flushed out.
☆Hope this helps you or anyone else out who is looking to save money and do it themselves.
In on disability now due to a spinal injury that occurred while I was a marine mechanic.But I was a certified Mercury and Yamaha outboard technition for 20 years.if you have any other questions just let me know..
-Bradley

**Q: Is this blue in color**
A: No - just received it.  Disappointed - why is it so difficult to find premium gear oil that is blue-green in color.  What I did not see on the label for units below 75 hp.  Since I cracked the seal not sure I can return it.

**Q: can i use this on a 190hp sterndrive?  Mercruiser I/O sterndrive for outdrive gear lube?**
A: Yes effectively its the same compounds

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great replacement oil, good price!
*by T***R on October 30, 2025*

Great oil replacement for Mercury outboard. I bought this product to change the lower unit gear oil on my 3.5 HP Merc outboard and it has ran good all summer.

### ⭐⭐⭐⭐⭐ Great product.
*by S***R on December 7, 2025*

Great product, great price.

### ⭐⭐⭐⭐⭐ Excellent product
*by S***L on November 10, 2025*

Must have on an ebike

## Frequently Bought Together

- Quicksilver by Mercury Marine 80W-90 Premium Gear Lube, Marine Engine, 32 oz.
- 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)
- Quicksilver by Mercury Marine 25W-40 Marine Engine Oil

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-07*