Specially engineered for marine applications. Durable formulation protects in severe conditions, from all-day trolling to high-rpm operation. Heavily fortified with advanced additives designed to prevent deposits, rust and corrosion. Use in gasoline-fueled four-stroke inboards, outboards, inboard/outboards and personal watercraft, including those made by Honda,* Mercury,* Yamaha,* Johnson/Evinrude,* Bombardier/BRP,* Suzuki,* Nissan,* Tohatsu,* OMC,* Volvo-Penta,* Mercruiser,* Chevrolet* and Ford.*
Naturally strong base oils resist viscosity loss due to mechanical shear.
Develops a tough lubricating film that protects engine parts, even in high-heat, high-rpm conditions that break down other oils.
Contains robust anti-wear additives that further reduce wear in metal-to-metal contact regions, guarding against compression loss for maximum power and engine life.
EXCELLENT ANTI-RUST PERFORMANCE
Fortified with potent inhibitors that guard against damaging rust and corrosion.
Protects engines during use and during inactivity or long-term storage.
NMMA CERTIFIED
Certified by the National Marine Manufacturers Association (NMMA) for use in four-stroke outboard motors.
Demonstrates outstanding performance and meets the requirements of the NMMA FC-W Catalyst Compatible specification, which is backward-compatible with the FC-W specification.
*All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.
My Yamaha F115 outboard runs smoothly and efficiently. Been using this oil for the last 5 years, highly recommended!
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Engine
By 
ANTHONY, 
a 
Verified Buyer 
from 
Port Colborne Ontario Canada 
on 
November 13, 2024
I've been using this oil in my 75hp Yamaha for 10 Plus years
I'm a charter boat for fishing which means I depend on my motor running at peak performance
This motor idles for 2-6 hours per trip. I inspect my spark plugs regularly and have never had an issue with fouling plugs. when i go to full throttle she never lets me down. I change its oil once a year and like what I see.
Great oil as always. However, got a new motor this year and the look up guide sucks. Hasn’t been changed in years. Just refer to your owners manual for correct application.
Good stuff! Got it in my cars, trucks (diesel & gas), tractors, mowers, saws, skid steer, backhoe, boat, bikes, & bedrooms (squeaky hinges/springs ya know). AMSOIL hasn't let me down in 25 years. Proud, proud, proud!
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
Suzuki 150hp & Suzuki 9.9hp
By 
Too Tall, 
a 
Verified Buyer 
from 
Port Angeles, WA. 
on 
April 24, 2024
Been using Amsoil Marine Oil since motors were new, 2009. Have had zero engine problems. Also use lower unit oil, filters and grease.
Quality products
By 
Mike K, 
a 
Verified Buyer 
from 
NJ 
on 
April 03, 2024
I have been running Amsoil marine products in my Yamaha SHO outboards since 2014. The motors run great even under the heavy strain of "run and gun" bass fishing. Shifting with the Amsoil lower gear oil is fantastic, no clunking going between forward/reverse and the contamination during yearly changes is minimal.
Have used Amsoil in my Honda 225 s since new in 2006..they now have 1000 hours on them..they have never used any oil ..oil after each season looks like it has never been used
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