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Your order may take longer than normal to arrive. We are experiencing extremely high demand and freight carriers are experiencing delays nationwide. LTL shipments are most severely affected.

AMSOIL 10W-40 Synthetic Marine Engine Oil

Product code : WCFQT-EA

Excellent high-stress, high-rpm endurance
Increased rust and corrosion protection
NMMA FC-W Catalyst Compatible
• Perfect for hardcore anglers and boaters who demand the best protection for their marine engines

Excellent high-stress, high-rpm endurance
Increased rust and corrosion protection
NMMA FC-W Catalyst Compatible
• Perfect for hardcore anglers and boaters who demand the best protection for their marine engines

AMSOIL 10W-40 Synthetic Marine Engine Oil



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.*

See the Product Data Bulletin for full details.


FIGHTS ENGINE WEAR

  • 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.

See the Product Data Bulletin for full details.

*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.

AMSOIL 10W-40 Synthetic Marine Engine Oil



AMSOIL 10W-40 Synthetic Marine Engine Oil

  • 5
    Amsoil products
    By  JOHN,  a  Verified Buyer  on  October 27, 2021

    Describe the issue

    I've been using Amsoil as far back as 1996 in car's boat and small engine's . two and four cycle and Hell I even use it in a modified dirt car oil's lube's tranny fluid gas treatment's . and for those of us the live in sub zero climate the product's stay pliable every thing starts easier . When rebuilding the engine they are clean and cylinders still hash marks from honing yet. I'm sold , I've been wrenching for year. Keep up the good work and keep America running strong.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5
    Mechanic recommended
    By  JAMES,  a  Verified Buyer  from  Michigan   on  September 13, 2021

    Describe the issue

    I bought a new four stroke outboard and the mechanic said if it was his new engine he would use synthetic oil. I replaced the breaking oil with Amsoil and I noticed it ran smoother and quieter. Love it
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Good Oil for Boat not Used Much
    By  JAMES,  a  Verified Buyer  from  East Texas  on  September 06, 2021

    Describe the issue

    I haven't been good about changing the oil in my boat. In fact, I don't remember the last time it was changed. On an episode of Engine Masters, they talked about how engines that are not used often can collect water in the crank case when the engine heats and cools but never gets hot enough to boil out the water. And don't forget about fuel. Because Amsoil is designed for this type of application, it is worth the extra cost to have the piece of mind that my boat is protected and won't let me down because of oil break down.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5
    Suzuki DF90A
    By  MAD,  a  Verified Buyer  from  NC  on  September 06, 2021

    Describe the issue

    I got the Amsoil Marine 10W40 Full Synthetic. I bought my new 2020 boat/motor/trailer package in 2020. I have a Suzuki DF90A. I had the oil changed at 14 hours, this was my 20 hour oil change since I live about two hours away from the dealership that I bought it from. The motor only had an hour on it’s oil change, but I changed the oil/filter to my Amsoil 10W40 Marine and I love it. The motor fell in love with it. It was like bathing in liquid gold! Now that I have gone to Amsoil 10W-40 Marine, I plan on never going back to any of the others! Thanks Amsoil
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5
    Extreme Protection
    By  GINO,  a  Verified Buyer  from  Hobe Sound   on  September 04, 2021

    Describe the issue

    The only oil I will use in my outboard motors. You can hear and feel the difference.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5
    Great marine oil
    By  JOSEPH,  a  Verified Buyer  from  Rhode Island   on  September 04, 2021

    Describe the issue

    Amsoil is great to deal with , no hassle just place an order and it’s at your door a couple of days. The product speaks for it’s self I work on the ocean year round, at times it’s a very harsh environment on outboards. With amsoil oil in my outboard I see better performance then any other oil I’ve used in some 45 yrs.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Confidence
    By  MIKE,  a  Verified Buyer  from  Texas  on  August 29, 2021

    Describe the issue

    Being on the water fishing most days I wanted a lubricant to give me the longevity 4 stroke outboards need. I have confidence Amsoil will.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 4
    New Oil for a low hour motor.
    By  Chuck,  a  Verified Buyer  on  August 29, 2021

    Describe the issue

    I’ve just put this in my Honda 20 hp motor so it’s too early to tell how it will be long term. It is a beautiful honey colored oil.
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  • 5
    Still runs great
    By  DAN,  a  Verified Buyer  from  Santa Cruz ca  on  August 27, 2021

    Describe the issue

    Getting close to 5000 hours on my outboard and it still runs good. I believe it’s because I use amsoil oil synthetic.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    More protection than OEM mineral oils
    By  RUSSELL,  a  Verified Buyer  from  Kentucky Lake  on  August 25, 2021

    Describe the issue

    When I spend so much money on new waverunner, I sure want the best oil money can buy.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?