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.
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
I will be changing the oil in my boat motor sometime this spring. this will be the second season on the motor. I was advised by the dealership to use Mercury marine oil on the first oil change for brake-in purposes. This will be the first oil change for Amsoil.
Was this review helpful?
5 star rating
MARINE ENGINE OIL
By 
EDWARD, 
a 
Verified Buyer 
from 
Great Lakes 
on 
November 22, 2023
We have been using this oil in our 1991 4.3L engine for over a decade. The engine now has a few thousand hours on it. We use nothing but Amsoil in all our rigs (trucks, sleds, boat motors)
Bottom Line
Yes, I would recommend this to a friend.
Was this review helpful?
5 star rating
idle
By 
Tony, 
a 
Verified Buyer 
from 
port colborne 
on 
November 10, 2023
75 HP Yamaha.This oil is great as the years have shown me; as this engine idles 3-6 hours without carbon buildup and when i accelerate to top speed (weather permitting) there is no smoke or hesitation
When I check the spark plugs they are in excellent condition .
Free Shipping on orders of $100 US ($130 CA) or more.
Birthday Gift of a $5 coupon to help celebrate your day.
$5 Back with every $100 you spend.
Exclusive Offers throughout the year.
Free Membership renewal when you spend $500 or more.
Plus, Preferred Customers receive the quarterly AMSOIL Magazine with the latest product details, technical information and complete product catalog. Learn More >
Your browser is outdated.
Thank you for visiting www.amsoil.com. Certain parts of this website may not function with Internet Explorer. To continue shopping with us, please update your browser using one of the options below.