Excellent oil characteristics that prolong engine life during hot summer months and cold winter storage. love this oil.

I have run this oil in my 4 stroke Suzuki DF50 outboard since I took the break in oil out. This motor gets run HARD either running wide open up the Missouri River or idling for long periods in no wake areas and this oil shows no signs of giving up between 100hr service intervals. The inside of this motor is spotless and I don’t worry about corrosion even during longer term storage.

My Yamaha F115 outboard runs smoothly and efficiently. Been using this oil for the last 5 years, highly recommended!

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!

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

Two Thumbs Way High !

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

Can’t get better protection.

Very poor service

I ordered oil and oil filter for my mercury but they didn’t send me the wright filter and they didn’t gave me my money back…very 30058720 poor service

This is the best marine oil out there. Tested it in my boat.

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.

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)

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 .

Have been using Amzoil for 17 year's have never had an oil related problem. Put marine oil in 300 hp mercury and 15 hp kicker the kicker was noticeable smoother running.

Great product. Used in a 2004 Seaswirl. No problems.

This is the only oil for my Yamaha big motor and my kicker. Amsoil is the way for me