20 Best Lower Unit Gear Oil [2024]

Are you looking for the best lower unit gear oil? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling lower unit gear oil.

We Recommended:

# Preview Product
1 Quicksilver 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser... Quicksilver 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser...
2 Quicksilver 80W-90 Premium Gear Lube - Marine Engine - 32 Ounce Quicksilver 80W-90 Premium Gear Lube - Marine Engine - 32 Ounce
3 Slippery Pete - Lower Unit Gear Oil Pump for Standard Quart Bottles, Includes 3/8 inch Metal Swivel,... Slippery Pete - Lower Unit Gear Oil Pump for Standard Quart Bottles, Includes 3/8 inch Metal...
4 STAR BRITE Synthetic Blend Lower Unit Gear Lube 80w 90w - 32 OZ (027232) STAR BRITE Synthetic Blend Lower Unit Gear Lube 80w 90w - 32 OZ (027232)
5 Valvoline High Performance SAE 80W-90 Gear Oil 1 QT Valvoline High Performance SAE 80W-90 Gear Oil 1 QT
6 STAR BRITE High Viscosity Lower Unit Gear Lube 80w 90w - 32 OZ (027032) STAR BRITE High Viscosity Lower Unit Gear Lube 80w 90w - 32 OZ (027032)
7 Mercury SAE 90 High Performance Gear Lube Mercury SAE 90 High Performance Gear Lube
8 OEM Yamaha Lower Unit Gear Lube HD F350 and V8 ACC-GLUBE-HD-QT OEM Yamaha Lower Unit Gear Lube HD F350 and V8 ACC-GLUBE-HD-QT
9 Sierra 18-9650-5 Hi-Performance Gear Lube - 5 Gallons Sierra 18-9650-5 Hi-Performance Gear Lube - 5 Gallons
10 Yamalube ACC-GLUBE-HD-GL Marine Lower Unit Gear Lube HD (GALLON) Yamalube ACC-GLUBE-HD-GL Marine Lower Unit Gear Lube HD (GALLON)
11 STAR BRITE Hypoid 90w Lower Unit Gear Lube - 32 OZ (027132) STAR BRITE Hypoid 90w Lower Unit Gear Lube - 32 OZ (027132)
12 STAR BRITE Premium Type C Lower Unit Gear Lube - 32 OZ (027332) STAR BRITE Premium Type C Lower Unit Gear Lube - 32 OZ (027332)
13 YAMAHA Yamalube OEM Outboard Gear Lube Kit w/Pump, ACC-GEARL-UB-QT Lower Unit Oil, 90430-08003-00... YAMAHA Yamalube OEM Outboard Gear Lube Kit w/Pump, ACC-GEARL-UB-QT Lower Unit Oil, 90430-08003-00...
14 LubriMatic 11552 High Viscosity 80w/90 Marine Lower Unit Gear Lube, 1 Quart Bottle LubriMatic 11552 High Viscosity 80w/90 Marine Lower Unit Gear Lube, 1 Quart Bottle
15 Yamaha Yamalube OEM Twin Outboard Gear Lube Kit w/ Pump, Acc-GEARL-UB-QT Lower Unit Oil,... Yamaha Yamalube OEM Twin Outboard Gear Lube Kit w/ Pump, Acc-GEARL-UB-QT Lower Unit Oil,...
16 Oklahoma Joe's Longhorn Reverse Flow Smoker, Black Oklahoma Joe's Longhorn Reverse Flow Smoker, Black
17 Kamado Joe KJ23RHC Classic Joe II 18-inch Charcoal Grill with Cart and Side Shelves, Blaze Red Kamado Joe KJ23RHC Classic Joe II 18-inch Charcoal Grill with Cart and Side Shelves, Blaze Red
18 Yamaha ACC-GEARL-UB-QT Gearcase Lube, 1 Quart Yamaha ACC-GEARL-UB-QT Gearcase Lube, 1 Quart
19 Lower Unit Gear Lube Pump for Standard Quart Bottles Fits All Mercury and Mariner Outboards Lower Unit Gear Lube Pump for Standard Quart Bottles Fits All Mercury and Mariner Outboards
20 Quicksilver 80W-90 Premium Gear Lube - Marine Engine - 9 Ounce Quicksilver 80W-90 Premium Gear Lube - Marine Engine - 9 Ounce
Bestseller No. 1
Quicksilver 858064Q01 High Performance SAE 90 Gear Lube 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 75 HP
  • Extreme pressure synthetic additives protect gears from metal to metal contact
  • Extends gear life in extreme conditions including high-speed and high-horspower applications
  • SAE 90 viscosity
SaleBestseller No. 2
Quicksilver 80W-90 Premium Gear Lube - Marine Engine - 32 Ounce
  • Formulated to protect against corrosion and excessive wear
  • Improved emulsifiers protect gears should water enter the gear housing
  • Designed for outboard applications below 75 HP
  • Special additives protect gears from metal to metal contact.Exclusive formulation helps improve film adhesion to gears
  • 25W-40 viscosity
SaleBestseller No. 3
Slippery Pete - Lower Unit Gear Oil Pump for Standard Quart Bottles, Includes 3/8 inch Metal Swivel,...
  • 🚤 PUMPS 8CC PER PUMP STROKE (Includes Metal 3/8" Adapter Connected To Clear Plastic Tubing)
  • 🚤 THIS GEAR OIL CHANGE KIT includes 3 adapter sizes. 3/8"(Swivel, Metal), 8mm and 10mm (Metal). Take the guess work out of figuring out the size of...
  • 🚤 2 Rigid Suction Tubes REACHES TO BOTTOM OF TALL AND SHORT GEAR OIL BOTTLES
  • 🚤Easy To Follow Instructions On Back Of Header Card
  • 🚤 Re-closeable Poly Bag for Storage
Bestseller No. 4
STAR BRITE Synthetic Blend Lower Unit Gear Lube 80w 90w - 32 OZ (027232)
  • High performance to meet the needs of high powered marine engines.
  • These products exceed all engine manufacturers-Feet specifications and are designed specifically for the marine environment.
  • Recommended for use in Mercury, Mercruiser, Johnson, Evinrude, OMC, Force, Mariner, Nissan, Suzuki, Yamaha and Volvo.
  • Recommended for all engines over 100 hp Protects against rust and corrosion.
  • Superior thermal stability Protection over a wide temperature range.
Bestseller No. 5
Valvoline High Performance SAE 80W-90 Gear Oil 1 QT
  • Protects Against Severe Temperatures To Help Extend Service Life
  • Formulated With Extreme-Pressure Additives To Minimize Gear Wear From Shock Loads
  • Helps Protect Against Gear Wear From Scuffing, Scouring, Corrosion And Pitting
  • Recommended For Conventional Hypoid Differentials And Non-Synchronized Manual Transmissions In Passenger Cars, Light Trucks, Sport Utility Vehicles,...
Bestseller No. 6
STAR BRITE High Viscosity Lower Unit Gear Lube 80w 90w - 32 OZ (027032)
  • Recommended for use in Mercury, Mercruiser, Johnson, Evinrude, OMC, Force, Mariner, Nissan, Suzuki, Yamaha and Volvo Will not void manufacturers...
  • Formulated with special anti-wear additives, rust and corrosion inhibitors.
  • For lower units of all outboard motors and stern drives.
Bestseller No. 7
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
Bestseller No. 9
Sierra 18-9650-5 Hi-Performance Gear Lube - 5 Gallons
  • Protects gears, bearings and other gear case components
  • For use in high performance and high load operating conditions in both outboard and I/O lower units
  • Designed to surpass the performance of the O.E. Hi-Performance gear lubricants
  • GL-5 Rated Lube
  • 5 Gallon container
Bestseller No. 11
STAR BRITE Hypoid 90w Lower Unit Gear Lube - 32 OZ (027132)
  • Formulated with special anti-wear additives, rust and corrosion inhibitors.
  • These products exceed all engine manufacturers-Feet specifications and are designed specifically for the marine environment.
  • Recommended for use in Mercury, Mercruiser, Johnson, Evinrude, OMC, Force, Mariner, Nissan, Suzuki, Yamaha and Volvo Will not void manufacturers-Feet...
  • The ultimate lubrication for maximum performance and economy.
Bestseller No. 12
STAR BRITE Premium Type C Lower Unit Gear Lube - 32 OZ (027332)
  • Recommended for electric shift gear cases used on Johnson and Evinrude outboards (1962-'72)
  • Recommended for OMC sterndrives (1977 & earlier) and other Type C applications
  • Premium Type C Lower Unit Gear Lube
Bestseller No. 13
YAMAHA Yamalube OEM Outboard Gear Lube Kit w/Pump, ACC-GEARL-UB-QT Lower Unit Oil, 90430-08003-00...
  • Genuine OEM Yamaha Lower Unit Gear Lube & Gaskets
  • Includes Lower Unit Gear Lube Quart Pump
  • Fits ALL Yamaha Outboards that use SAE 90 Gear Lube
  • Keep your Yamaha Outboard running at peak performance with OEM Genuine Yamaha Parts
SaleBestseller No. 14
LubriMatic 11552 High Viscosity 80w/90 Marine Lower Unit Gear Lube, 1 Quart Bottle
  • Ideal For Modern Outboard And Stern Strive Lower Units
  • Meets Or Exceeds Api-Mt-1And Gl-5 Ratings
  • Will Not Void Manufacturers Warranties
  • Country Of Origin: China
SaleBestseller No. 15
Yamaha Yamalube OEM Twin Outboard Gear Lube Kit w/ Pump, Acc-GEARL-UB-QT Lower Unit Oil,...
  • Genuine OEM Yamaha Lower Unit Gear Lube & Gaskets
  • Includes Lower Unit Gear Lube Quart Pump with Yamaha adapter
  • Fits ALL Yamaha Outboards that use SAE 90 Gear Lube
  • Keep your Yamaha Outboard running at peak performance with OEM Genuine Yamaha Parts
  • Great for TWIN Outboard set up - Includes 4 Lower Unit Gaskets (enough to change 2 lower units)
Bestseller No. 16
Oklahoma Joe's Longhorn Reverse Flow Smoker, Black
  • The Longhorn Reverse Flow Offset Smoker provides the best for you outdoor cooking needs. With optional smokestack locations you choose between reverse...
  • Charcoal fuel allows you to grill with high heat or cook low and slow
  • 751-square-inches of primary cooking space; 309-square-inches of secondary cooking space
  • Heavy-gauge steel construction ensures durability you can trust
  • Professional temperature gauge for accurate monitoring
Bestseller No. 17
Kamado Joe KJ23RHC Classic Joe II 18-inch Charcoal Grill with Cart and Side Shelves, Blaze Red
  • Premium 18″ Ceramic Grill with Cast Iron Cart & Locking Wheels – The Kamado Joe Classic II gives the perfect cooking size of 18 inches along with...
  • 2-Tier Divide & Conquer - Divide & Conquer Flexible Cooking System transforms the humble grill grate into the most powerful cooking tool in your...
  • Kontrol Tower Top Vent - Maintains consistent air setting for precise airflow management during dome opening and closing. Constructed of powder coated...
  • Air Lift Hinge – The air lift hinge significantly reduces dome weight. The grill dome can be lifted with a single finger giving the most comfortable...
  • AMP (Advanced Multi-Panel) FireBox – The patent pending six-piece design eliminates breakage and increases grill efficiency.
Bestseller No. 19
Lower Unit Gear Lube Pump for Standard Quart Bottles Fits All Mercury and Mariner Outboards
  • Fit all Quart Bottles, perfectly used on 32 ounce (946 ml) Gear Lube Bottle.
  • 3/8"‑16 adapter fits for all Mercury and Mariner Outboard Motors and other American made outboards.
  • 8mm aluminum adapter fits for Yamaha Nissan Tohatso Honda and Johnson Evinrude outboards.
  • Include 1 suction tube which can reach the bottle bottom. 8 cc stable current per stroke. Easy to use.
  • Satisfaction Guarantee -- Yoursme aims to provide excellent products and best service for customers. You can simply return it if you are not satisfied...
Bestseller No. 20
Quicksilver 80W-90 Premium Gear Lube - Marine Engine - 9 Ounce
  • Formulated to protect against corrosion and excessive wear
  • Designed for outboard applications below 75 HP
  • Improved emulsifiers protect gears should water enter the gear housing
  • 8 ounce tube
  • 80W-90 viscosity

Having trouble finding a great lower unit gear oil?

This problem is well understood by us because we have gone through the entire lower unit gear oil research process ourselves, which is why we have put together a comprehensive list of the best lower unit gear oils available in the market today.

After hours of searching and using all the models on the market, we have found the best lower unit gear oil for 2023. See our ranking below!

How Do You Buy The Best Lower Unit Gear Oil?

Do you get stressed out thinking about shopping for a great lower unit gear oil? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching lower unit gear oil, which is why we have assembled a comprehensive list of the greatest lower unit gear oil available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for lower unit gear oil that you consider buying. Your questions might include the following:

  • Is it worth buying an lower unit gear oil?
  • What benefits are there with buying an lower unit gear oil?
  • What factors deserve consideration when shopping for an effective lower unit gear oil?
  • Why is it crucial to invest in any lower unit gear oil, much less the best one?
  • Which lower unit gear oil are good in the current market?
  • Where can you find information like this about lower unit gear oil?

We’re convinced that you likely have far more questions than just these regarding lower unit gear oil, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for lower unit gear oil, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible lower unit gear oil. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an lower unit gear oil buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available lower unit gear oil currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of lower unit gear oil has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an lower unit gear oil?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your lower unit gear oil.
  5. Customer Ratings: Number ratings grade lower unit gear oil objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their lower unit gear oil.
  7. Product Quality: You don’t always get what you pay for with an lower unit gear oil, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an lower unit gear oil is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining lower unit gear oil information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding lower unit gear oil is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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