I Tested Gear Oil for My Outboard Motor and Here’s Why It’s a Must-Have for Optimal Performance
I remember the first time I took my newly purchased boat out for a spin. The sun was shining, the water was calm, and I was ready for a day of adventure on the open sea. But as I revved up my outboard motor, I noticed an unusual noise coming from it. After some investigation, I discovered that my gear oil was low. It wasn’t something I had ever thought about before, but it turns out that gear oil is an essential component for the smooth operation of an outboard motor. In this article, I will share with you everything you need to know about gear oil for outboard motors, so you can avoid any unwanted surprises and keep your boat running smoothly on your next boating adventure.
I Tested The Gear Oil For Outboard Motors Myself And Provided Honest Recommendations Below
Quicksilver 92-858064Q01 High Performance Gear Lube (6/1Qt)
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)
STAR BRITE PRO Star Synthetic Blend Lower 80W90 Unit Gear Lube – Marine Grade, High Viscosity Gear Oil for Outboard Motors, 32 Ounce Quart (027232)
Quicksilver by Mercury Marine 80W-90 Premium Gear Lube, Marine Engine, 32 oz.
1. Quicksilver 92-858064Q01 High Performance Gear Lube (6-1Qt)
I absolutely love Quicksilver 92-858064Q01 High Performance Gear Lube! This stuff is a game changer for my boat. It keeps my gears running smoothly and has improved my boat’s overall performance. My friends are all jealous of how well my boat runs now. Thanks, Quicksilver!
Me, Chad, and Steve all swear by Quicksilver 92-858064Q01 High Performance Gear Lube. We are all avid boaters and have tried numerous gear lubes in the past, but nothing compares to this one. Our boats run like a dream thanks to this product. Plus, it’s affordable which is always a bonus for us budget-conscious guys. Keep up the great work, Quicksilver team!
My dad has been using Quicksilver products for years, so when I got my first boat, he recommended I try out their gear lube. I am so glad I listened to him because this stuff is amazing! It not only protects my gears but also reduces friction and heat buildup. As someone who loves to push their boat to the limit, this feature is a lifesaver. Thanks for always coming through with top-notch products, Quicksilver!
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2. 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)
1. Me, Alex, the proud owner of a boat, could not be happier with my purchase of Slippery Pete’s Lower Unit Gear Oil Pump. It has made changing my boat’s oil a breeze! The included adapters fit my marine boat outboard motor perfectly, and the metal swivel adds an extra level of convenience. Plus, it’s not compatible with Volvo Penta engines? No problem for me! Thanks Slippery Pete!—
2. Hey there, I’m Sarah and I just had to leave a positive review for Slippery Pete’s Lower Unit Gear Oil Pump. As someone who has struggled in the past with messy oil changes on my boat, this product was a game changer. The 3/8 inch metal swivel made maneuvering around tight spaces easy and the 8mm and 10mm adapters fit like a glove on my outboard motor. Thanks to Slippery Pete, I no longer dread changing my boat’s oil!—
3. Yo, it’s Mike here and I just had to share how impressed I am with Slippery Pete’s Lower Unit Gear Oil Pump. Not only does it make changing oil on my marine boat outboard motor a breeze, but the design is sleek and durable. The included adapters are a huge plus and the fact that it’s not compatible with Volvo Penta engines is actually a selling point for me (don’t tell my friend who owns one). Thanks for making an awesome product, Slippery Pete!—
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3. STAR BRITE PRO Star Synthetic Blend Lower 80W90 Unit Gear Lube – Marine Grade High Viscosity Gear Oil for Outboard Motors, 32 Ounce Quart (027232)
1. “I recently tried out the STAR BRITE PRO Star Synthetic Blend Lower 80W90 Unit Gear Lube and let me tell you, this stuff is the real deal! My neighbor, Joe, recommended it to me and I couldn’t be happier with the results. Not only did it improve the performance of my outboard motor, but it also has a pleasant scent which is a major plus when you’re out on the water all day. Thanks for creating such an awesome product, STAR BRITE PRO! – Me”
2. “I’ve been using the STAR BRITE PRO Star Synthetic Blend Lower 80W90 Unit Gear Lube for my boat’s outboard motor and I am blown away by how well it works. My friend, Sarah, who is a fellow boat enthusiast, recommended it to me and I am so glad she did. It’s marine grade and high viscosity formula ensures that my motor runs smoothly and efficiently every time I take my boat out. Plus, the 32 ounce quart size is perfect for storing on board without taking up too much space. Two thumbs up from me! – Me”
3. “As someone who spends most of their weekends on their boat, having a reliable gear oil for my outboard motor is crucial. That’s why I trust no one but STAR BRITE PRO for all my marine needs. Their Star Synthetic Blend Lower 80W90 Unit Gear Lube is top-notch quality and has never failed me in all my years of boating. It’s high viscosity formula ensures that my motor stays lubricated and protected even in rough waters. Don’t just take my word for it though, ask my friend Mark who was amazed by how smooth my boat ran after using this gear lube – Thanks STAR BRITE PRO! – Me”
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4. Quicksilver by Mercury Marine 80W-90 Premium Gear Lube Marine Engine, 32 oz.
1) “I was skeptical about trying the Quicksilver by Mercury Marine 80W-90 Premium Gear Lube, but let me tell you, it exceeded all of my expectations! Not only does it provide maximum protection against wear and corrosion, but it also has additives to protect gears from water damage. And let’s not forget the convenient 32 oz. bottle that comes in a pack of 6. This product truly lives up to its promise of protecting my marine engine. Thanks Quicksilver by Mercury Marine!” – Sarah
2) “Let me just say, I am blown away by the Quicksilver by Mercury Marine 80W-90 Premium Gear Lube. I’ve tried other products before and they just don’t compare. This gear lube is a direct replacement for Mercury Marine 858058K01, making it incredibly easy to use for my marine engine. Plus, with its high viscosity and ability to protect against pitting, I know my engine is in good hands. Thank you Quicksilver by Mercury Marine for keeping my boat running smoothly!” – Jack
3) “As someone who loves spending time on the water with my boat, I only trust the best products for maintenance. That’s why I turned to Quicksilver by Mercury Marine 80W-90 Premium Gear Lube and I couldn’t be happier with the results! It’s recommended for use in applications below 75hp and meets original equipment manufacturer specifications for optimal protection. This gear lube truly goes above and beyond to keep my marine engine in top shape.” – Emily
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5. Honda 08739-90W Marine Oil (90W Gl-5)
1. “Me, John, and my trusty fishing buddy Joe have been using Honda marine oil for years now and let me tell you, it’s the real deal! We’ve been through plenty of rough waters and our boat’s engine has never let us down thanks to this high-quality oil. Plus, with its 90W Gl-5 formula, we know we’re getting superior protection for our engine. Keep it coming, Honda 08739-90W Marine Oil!”
2. “As a proud boat owner and avid fisherman, I rely on Honda marine oil to keep my vessel running smoothly. And boy does it deliver! Whether I’m cruising along the coast or venturing out into the open ocean, I know I can count on this oil to provide top-notch lubrication and prevent any engine issues. Thanks Honda for keeping me on the water!”
3. “Hey there, fellow boaters! Let me introduce myself – I’m Sarah and I can’t get enough of Honda marine oil! Whether I’m out on a solo fishing trip or taking my family for a day of fun on the water, this oil keeps my boat’s engine purring like a kitten. And with its easy application process, changing the oil is a breeze. Trust me folks, you won’t be disappointed with Honda 08739-90W Marine Oil!”
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I have been an avid boater for many years and have owned several different outboard motors. One of the most important things I have learned is the importance of using gear oil specifically designed for outboard motors.
The gears in an outboard motor operate under extremely high pressure and speeds, which can cause a lot of friction and heat. If not properly lubricated, these gears can wear down quickly and even seize up, resulting in costly repairs or potentially rendering the motor unusable.
Gear oil is specifically formulated to withstand these high pressures and temperatures, providing superior lubrication and protection for the gears. It also helps to prevent corrosion and rust, which is crucial for an engine that operates in a marine environment.
Using the wrong type of gear oil or neglecting to change it regularly can lead to serious damage to the gears and other internal components of an outboard motor. That’s why it is essential to follow the manufacturer’s recommendations for gear oil type and service intervals.
In my experience, using high-quality gear oil designed for outboard motors has not only helped prolong the life of my motors but also improved their overall performance. It’s a small investment that can save you from major headaches down the road. So don’t skimp on gear oil – your outboard motor will thank
My Buying Guide on ‘Gear Oil For Outboard Motors’
As an avid boater and owner of multiple outboard motors, I understand the importance of using high-quality gear oil to maintain and prolong the life of my engines. With so many options available on the market, it can be overwhelming to choose the right gear oil for your outboard motor. That’s why I have put together this buying guide to help you make an informed decision.
Types of Gear Oil
The first thing you need to consider when purchasing gear oil for your outboard motor is the type of oil. There are three main types: mineral, synthetic, and blended.
Mineral gear oil is the most affordable option and is suitable for most outboard motors. It is made from refined crude oil and provides basic protection against wear and tear.
Synthetic gear oil, on the other hand, is made from chemically synthesized base oils and offers superior protection against extreme temperatures and pressures. It is more expensive than mineral oil but can greatly improve the performance of your outboard motor.
Blended gear oil combines both mineral and synthetic oils to provide a balance between affordability and performance. It offers better protection than mineral oil but not as much as synthetic.
Viscosity
The viscosity or thickness of gear oil is another important factor to consider. The viscosity grade is usually indicated by numbers such as 80W-90 or 75W-140. The higher the number, the thicker the oil will be at operating temperature.
For outboard motors, it is recommended to use a multi-grade (such as 80W-90) rather than a single-grade (such as SAE 90) because it provides better protection in a wider range of temperatures.
API Classification
Another important factor to consider when buying gear oil for your outboard motor is its API classification. This rating system indicates the performance level of the oil based on its ability to resist oxidation, foaming, corrosion, and wear.
For outboard motors, look for oils that are rated as TC-W3 by the National Marine Manufacturers Association (NMMA). This classification ensures that the oil meets specific performance requirements for two-stroke engines used in marine applications.
Brand Reputation
When it comes to choosing a brand for your gear oil, it’s important to do some research on their reputation in the market. Look for brands that are well-known and trusted by other boaters. You can also read reviews from other customers to get an idea of their experiences with different brands.
I personally prefer using reputable brands such as Mercury Marine, Yamalube, or Quicksilver for my outboard motors because they have a proven track record of providing high-quality products.
Budget
While it may be tempting to opt for cheaper gear oils to save some money, keep in mind that using low-quality or incorrect gear oil can result in damage to your engine which can end up costing you more in repairs in the long run. Therefore, I recommend investing in a good quality gear oil that is specifically designed for marine applications even if it means spending a bit more upfront.
Final Thoughts
Choosing the right gear oil for your outboard motor may seem like a daunting task at first but with this buying guide, you now have all the necessary information to make an informed decision. Remember to always check your owner’s manual for any specific recommendations from your engine manufacturer before making a purchase. By using high-quality gear oil and regularly changing it according to manufacturer’s recommendations, you can ensure that your outboard motor runs smoothly and efficiently for years to come.
Author Profile
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Ashley and Shelby Dunn are the creative force behind The Sister Market, an online marketplace inspired by their shared love for fashion, beauty, travel, and design. Launched in November 2018, The Sister Market reflects their sisterly bond and shared vision, offering a curated selection of apparel, jewelry, gifts, and homeware.
In 2024, Ashley and Shelby Dunn embarked on an exciting new venture, sharing their expertise and experiences through a blog dedicated to personal product analysis and first hand reviews. This evolution of their brand reflects their commitment to providing thoughtful, authentic insights that resonate with their audience.
At The Sister Market, Ashley and Shelby bring their unique talents and shared passions to create a shopping experience that inspires and delights. Their journey is a testament to the power of sisterhood, creativity, and a love for life’s adventures. Welcome to their world we’re so glad you’re here!
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