Product Reviewed: 75W/80W-90 Marine Gear Lube (AGM)
Current Rating: 4.9 out of 5 stars
Votes & Reviews: 24 vote(s) and 29 user reviews.
Reviewed by EZ: 
Wouldn't use anything else...28ft pontoon...125hp 4stroke...
Reviewed by RMC:
I been using Amsoil Synthetic Marine Gear Lube on my 2017, 115hp Yamaha outboard. This product is awesome product. So far everytime I change my gear oil it's been clean with no water, it helps in smooth shifting. Excellent product, I would recommend this product for all outboard gear oil.
Reviewed by Bobby:
This has protected my lower unit for the last 12 years and my internal parts still look brand new.
Reviewed by Aido:
I use this in my work boat every day from ice out to ice in on Georgian Bay. Shifts smooth and always stays clean.
Reviewed by Bill:
I use this for Mercury outboard gear cases and it has never let me down.
Reviewed by Michael:
Bought an 89 Boat with a Cobra out drive. Previous owner had used amsoil and gave me a quart with the purchase. Once I drained the out drive for winter and saw the oil coming out I got more. This stuff is fantastic
Reviewed by Dan:
I use this in my 225 Yamaha and my 9.9 kicker for my Lund 2025. It s the only oils for my Yamahas.
Reviewed by D:
Great product
Reviewed by Scarab Jim:
I use this product in the Alpha One Gen. II outdrives on my twin engine Scarab. I`m pushing 400hp. through them and they continue to hold up because of this gear lube.
Reviewed by Chris:
Great product
Reviewed by Jeff:
I have never had a problem when using this product. I will continue to use it exclusively!
Reviewed by None:
I have used and oil since the seventies in cars and boat. I go app 5000 miles 0n quart. both my son's use it the best.
Reviewed by Jeff:
Good product, quick delivery, nice website, I'm a fan of Amsoil.
Reviewed by Reggie:
After using on multiple Yamaha outboard engines more than 100 hrs between gearcase changes ; the oil looks Chrystal clear very impressive the oil should extend the life of gearcase .
Reviewed by Pat:
Never had a problem with the lower unit and it is 15 years old.
Reviewed by Dave:
Used in Mercury Race outboard gearcase's protects internals, never any metal on the magnet.
Reviewed by Trotline:
I use this oil in my 5.7 hemi engine. My engine runs smoother and cooler.
Reviewed by Jim:
Has preformed very well and well continue to use
Reviewed by Jim:
Has preformed very well and well continue to use
Reviewed by CkDLND:
Works great even up north where I live in 32 degree water
Reviewed by EJ:
I have used the marine gear lube for many years its never let me down I highly recomend this product!!!
Reviewed by Joe:
I use this in a 1981 75hpJohnson outboard.
Little to no smoke. Smooth running. Cylinders stay clean and does not foul plugs like other oils. Even Evinrude synthetic. Awesome product.
Reviewed by Mikeapple01:
I've been using Amsoil since the 80's and I'm an ASE certified diesel mechanic with over 30 years of experience. I haven't found any other lubricant that comes close to Amsoil, I recently purchased a boat and drained all the fluids and replaced them with Amsoil marine lubricants. I know I will get years of worry free performance while using Amsoil.
Reviewed by ihboy75:
Good alternative to standard product
Reviewed by James:
This product is used in a 2013 Mercury 4 stroke outboard, 150hp. I change the oil every season with about 75 hours of use.
Reviewed by Larry:
I believe synthetic oils are great for any moving metal parts. No wear, No friction, saves money in years to come and makes my engines very dependable.
Reviewed by Daniel:
Better lube always I used in my Sea Ray Sundancer whit Bravo 3
Reviewed by carb:
easy to use and a great product.
Canada
United States
Reviewed by Rick:
Customer service
Just bought Amsoil Gear Lube and have only praise for their Customer Support. They went the extra mile to make sure my buying experience went smoothly.