Customer Ratings & Reviews

Bought my boat new in 2019 it's had AMS its whole life no metal in my oil at all every year in both 150 and 10 horse kicker. I do change the oil more often than needed I do it every year no matter how much I use my boat.

I have used this for years and my outboard motor still runs like new. A great marine oil!

Love this oil! I run it in my 2018 SeaDoo RXT-X 300. It still looks fresh and doesn’t smell burned after a summer’s worth of use on the Colorado River in extreme heat. I highly recommend it!

Works great

Last year I changed over to Amsoil Marine Engine Oil and Marine Gear Lube for the best protection in my boats. I've been running Amsoil products in all my vehicles, lawn and garden equipment, & generators, for the past several years. When I saw they also had marine oils, it was an easy decision to make the switch.

Yamaha sho likes the synthetic oil from Amsoil.

Love it. Keep going

true to its claim

Provides peace of mind with superior lubrication and water intrusion protection.

This is a premium oil that I trust to deliver longevity to my outboard.

Been using Amsoil 2stroke and 4stroke engine oil and gear lube for25 years. No Worries!

I have been using Amsoil for many years in everything I own that has a motor. Never had an engine failure and some of thos motors were / are high performance applications.

I'm a certified marine tech and i use the 10w30 oil for all my 4 strokes that recommend 10w30

2014 Yamaha 150 outboard engine running great. Still gets me out to sea and back, quiet and still strong after over 6000 hours

Excellent product best in the business..

I’ve been using Amsoil fluids on all my vehicles and UTV’s so it was given I would try it on my newly acquired boat. I performed first service on Yamaha VF250 SHO. Boy was I surprised to see the OEM oil absolutely black as coal at 16 hours of use. Now fast forward to 30 hours (14 hours with Amsoil) and the oil is golden tan! I know that color doesn’t matter when it comes to protection (what the labs say!) however color does depict dirt and stability. Amsoil has proven once again that their products do what they say, protect your investment! Will be using the Amsoil marine products as long as I own a boat.

I’ve been using amzoil oil since the day I could drive. Love the product

Best money can buy I never worry about running my boat hard or thermo break down I’ve been using AMSOIL in all my vehicles for years

Outstanding product part of a 18 item purchase including (2) gallon jugs. Shipping box used was horrible. Large box split along (2) of the long seams. Amsoil use a heavier than 32 lb crush box next time.

Have owned my boat with Honda BF90 outboard since 2004. Every year I change the main oil and gear lube with AMSOIL. Have not had any mechanical issues ever and the engine has been in the shop only three times in twenty-one years for tune-ups. Only use AMSOIL products in everthing I own.