With so many great Best Lower Unit Gear Oil to pick from, like those from brands such as Quicksilver,Generic,Yamaha Motor,MERCURY, it can be tricky for customers to decide what to buy. But after extensive research, we’ve discovered the stand-out Best Lower Unit Gear Oil currently on the market.
Our team rigorously tested numerous products available to consumers. The one that stands at the top of our list is Quicksilver Best Lower Unit Gear Oil, thanks to its impressive performance and features. Below you’ll find more of our top-rated picks, along with insightful analysis from our seasoned experts. Check out their thoughts before making your purchasing choice. With this guide backing your decision, you’re sure to end up with a Best Lower Unit Gear Oil you’ll love.
Editor's Choice
Quicksilver SAE 90 High Performance Gear Lube and Pump Kit for Mercury Outboards and Mercruiser
Premium Pick
Quicksilver by Mercury Marine 80W-90 Premium Gear Lube, Marine Engine, 32 oz.
Budget Pick
Genuine OEM 80W90 Driveshaft Hypoid Gear Oil 8oz Bottles for Honda ATV's Motorcycles, & SXS's
Top 10 Best Lower Unit Gear Oil
We researched and compared the top products in the Best Lower Unit Gear Oil category to provide you with these recommendations.
1. Quicksilver SAE 90 High Performance Gear Lube and Pump Kit for Mercury Outboards and Mercruiser
- Lower unit gear oil formulated to protect against corrosion and excessive wear
- Designed for outboard motor lower unit and sterndrive applications above 75hp
- Extreme pressure synthetic additives protect gears from metal to metal contact
- SAE 90 viscosity
- Produced to meet Mercury Marine original equipment manufacturer specifications to best protect your engine
- Previous manufacturer part number 802891Q05
- Manufacturer part number 8M0222069
2. Quicksilver by Mercury Marine 80W-90 Premium Gear Lube, Marine Engine, 32 oz.
- 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
3. Genuine OEM 80W90 Driveshaft Hypoid Gear Oil 8oz Bottles for Honda ATV's Motorcycles, & SXS's
- Genuine 80W90 Gear Oil 8oz Bottles.
- Single-application hypoid gear oil SAE 80W-90 approved for use in Gold Wings and other shaft-drive motorcycles and ATVs.
- Exceeds API service classifications GL-5 and GL-4.
- High shear strength resists viscosity breakdown under the most severe conditions.
- Special additives protect against wear, scuffing and corrosion.
- For use at ambient temperatures down to -15 degrees.
4. Yamaha New OEM 32 OZ. Lower Unit Gearcase Lube Quart, ACC-GEARL-UB-QT
- Flash Point: 161 Degrees Celsius
- Liquid Volume: 32 Fluid Ounces
- 80W-90 Weight
- High viscosity formula protects drives from high speed and high load use
- Formula includes unique rust and corrosion inhibitors to protect internal engine components even in saltwater environments
5. Mercury Marine New OEM High Performance Gear Lube with Hand Pump, 91-8M0101435
- Genuine OEM Factory Original Equipment Mercruiser Sterndrive & Outdrive Oil
- Exclusive formula is engineered to provide extended gear life in extreme conditions including high-speed and high-horsepower applications
- Extreme pressure synthetic additives protect gears from metal to metal contact
- Engineered to provide maximum protection for sterndrive and outboard lower units
- For use in most gear housings of Mercruiser sterndrives and all Mercury, Mariner, and Force Outboards
6. Mercury SAE 90 High Performance Gear Lube
- Genuine OEM Factory Original Equipment Mercruiser Sterndrive & Outdrive Oil
- Exclusive formula is engineered to provide extended gear life in extreme conditions including high-speed and high-horsepower applications
- Extreme pressure synthetic additives protect gears from metal to metal contact
- Engineered to provide maximum protection for sterndrive and outboard lower units
- For use in most gear housings of Mercruiser sterndrives and all Mercury, Mariner, and Force Outboards
7. Linkstyle Lower Unit Gear Oil Pump for Standard Quart Bottles, 3/8" Metal Swivel, 8mm & 10mm
- For Standard Quart Bottle: Lubricant fluid transfer pump fits 28mm-cap standard quart bottles. It includes a fixing clip at the pump outlet to prevent oil leaks and reduce mess
- 3 Adapter Sizes: Differential fluid pump kit includes 3/8'' swivel adapters to connect clear plastic hose, and 8mm & 10mm metal adapters, which fit most lower unit drain plugs
- 2 Suction Tube Sizes: Gear oil pump tool includes 6.25" and 4.77" rigid tubes that are oil-resistant, corrosion-proof, and transparent for easy access to tall or short quart bottles
- 8CC per Pump: Transmission fluid pump delivers 8CC per stroke. It can empty a full quart in 5 minutes or less, ideal for fast and efficient filling or changing outboard gear oil
- Wide Application: Gear lube pump works for boats, cars, trucks, RVs, and motorcycles. Transfers or changes engine, transmission, gear, antifreeze, or transformer oil in quart bottles
8. Lucas Oil 10652 Synthetic SAW 75W-90 M8 Marine Gear Oil - 1 Quart
- For best performance, follow the manufacturer's recommendations in your vehicle owners manual.
9. Yamaha New OEM Marine Gear Lube HD, 1 Quart, Acc-GLUBE-HD-QT
- This Yamaha Marine HD Gear Lube is intended for use in all Yamaha 4.2L V6, V8 and Yamaha V-MAX SHO Outboards.
- Each of these Yamaha Outboard models requires between 1.1 and 1.9 quarts of gear lube.
- Please verify your own fitment
10. Star Brite Premium Lower Unit Gear Lube
- LONG TERM PROTECTION - Ideal for all engines over 100 hp that require 80w 90w oil - provides exceptional long-term protection against rust and corrosion, extending your engine's lifespan
- SUPERIOR PERFORMANCE - High viscosity synthetic blend 80W-90 gear oil, meets all specs for API GL-5, API MT-1, SAE J2360, and Mack GO-J
- EXTREME PRESSURE ADDITIVES - Special additives ensure great thermal stability and anti-wear protection, even under high temperature conditions
- EASY INSTALLATION - Our gear oil comes with a detailed guide for flushing and filling; STAR BRITE offers a complete line of Lower Unit Quart Pumps, Lube Tubes, and Adaptors for hassle-free oil changes
- VERSATILE APPLICATION - Perfect upgrade for all brands of 80W90 lower unit gear oil and gear lube applications
- PROUDLY AMERICAN, TRUSTED GLOBALLY - Choose STAR BRITE for a leading name in marine, auto, RV, home, and outdoor products since 1973, all proudly crafted in the USA for superior quality and performance
Peter
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