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Find the AMSOIL Products You Need

More Time on the Water

Our boat maintenance checklist helps you spend more time on the water.

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Why Marine Oil?

Find out why dedicated marine oil is the key to protecting your boat’s engine.

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Easy Oil Changes

Changing your lower unit oil is simple with the AMSOIL Easy-Pack.

Boaters Love AMSOIL

"It’s the only oil I will use in my outboard motors. You can hear and feel the difference."

Gino, Verified Buyer

The AMSOIL Advantage

AMSOIL synthetic marine oil is engineered to deliver superior protection from the extreme moisture and heat sophisticated marine engines commonly face.

AMSOIL Disclaimer and Technical Concerns

Specifications contained on this website are based on manufacturers' information and were believed accurate at the time of publication. Our recommendations apply to AMSOIL products only, as we cannot be responsible for products from other manufacturers. Always compare fluids and lubricants that were installed in the vehicle with those replacing them during service. Never install more fluid or lubricant than what is considered adequate according to gradients on dipstick or level of filler hole. Fill and drain locations are for reference only. Failure to perform adequate inspections or obtain proper resolution will limit or negate any liability toward AMSOIL INC. Models introduced midyear may not have the same specifications as those produced earlier.

If any discrepancies are noted, they can be simply reported to AMSOIL by clicking on the "Problem?" link docked to the left. We review all reported problems, if you would like a personal response to the issue you are reporting please enter your email address in the space provided on the form.