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25W-40 Synthetic Blend Marine Engine Oil

Product code : WCMQT-EA

Engine performance and reliability are key to a successful day fishing or boating. High-rpm operation and constant exposure to water, however, invite engine wear and formation of rust and corrosion, reducing engine performance and life. AMSOIL 25W-40 Synthetic Blend Marine Engine Oil guards against wear while delivering excellent protection against rust and corrosion. It is Warranty Secure® and will not void your marine engine’s warranty.
Engine performance and reliability are key to a successful day fishing or boating. High-rpm operation and constant exposure to water, however, invite engine wear and formation of rust and corrosion, reducing engine performance and life. AMSOIL 25W-40 Synthetic Blend Marine Engine Oil guards against wear while delivering excellent protection against rust and corrosion. It is Warranty Secure® and will not void your marine engine’s warranty.
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25W-40 Synthetic Blend Marine Engine Oil



NMMAProtects Against Wear
Marine engines operate under high loads and rpm for extended periods. On average, a marine engine powering a boat 30 mph runs at about 5,000 rpm. In contrast, an automotive engine powering a car 60 mph runs at about 2,000 rpm. Higher stress causes traditional automotive oils to break down and lose viscosity. AMSOIL 25W-40 Synthetic Blend Marine Engine Oil is designed with excellent shear stability to deliver a consistent lubricating film. It helps guard engine components from wear for maximum life.

Excellent Anti-Rust Performance
Marine engines are prone to rust and corrosion due to constant exposure to humid, wet environments. Rust on engine parts acts like sandpaper, scouring bearings, the cylinder wall, piston rings and other components, while aluminum pistons and other parts can corrode. Rust and corrosion reduce engine power and eventually cause catastrophic failure.

Good rust protection is not natural to motor oil; it comes only by design. AMSOIL 25W-40 Synthetic Blend Marine Engine Oil is fortified with potent inhibitors that guard against damaging rust and corrosion.

  • Excellent high-stress, high-rpm endurance
  • Increased rust and corrosion protection

NMMA Certified
AMSOIL 25W-40 Synthetic Blend Marine Engine Oil is certified by the National Marine Manufacturers Association (NMMA) for use in four-stroke outboards, inboards, stern-drives (inboard/outboards) and PWC. This high-quality oil demonstrates outstanding performance and exceeds the NMMA "FC-W" (Four Cycle Water) specification requirements.

  • FC-W (CAT)® Registration Number: FC-11825T

* 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. All products advertised here are AMSOIL-engineered for use in the applications shown.

APPLICATIONS
Use in gasoline-fueled four-stroke inboards, outboards, inboard/outboards and personal watercraft that require any of the specifications listed below, including those made by Mercury* and Mercruiser*.

  • API SM
  • NMMA FC-W Catalyst Compatible

SERVICE LIFE
Four-stroke outboard motors and personal watercraft: Due to potential fuel dilution or water contamination, change oil at the engine or watercraft manufacturer-recommended interval. Inboard and I/O applications: Change oil at two times the engine manufacturer-recommended interval, or once a year, whichever comes first.

WARRANTY
AMSOIL 25W-40 Synthetic Blend Marine Engine Oil is Warranty Secure®, keeping your factory warranty intact. It is a high-performance replacement for vehicle manufacturer-branded products and is also backed by the AMSOIL Limited Warranty (G1363). For details, visit www.amsoil.com/warranty/.

Warranty Secure

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). And SDS is available via the Internet at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Recycle used oil and bottle.

25W-40 Synthetic Blend Marine Engine Oil



25W-40 Synthetic Blend Marine Engine Oil

  • 5
    By  RODNEY,  a  Verified Buyer  on  November 14, 2020

    Describe the issue

    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    By  Anonymous,  a  Verified Buyer  on  November 06, 2020

    Describe the issue

    Very dependable oil use in my 150 merc
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Better oil pressure
    By  Runky,  a  Verified Buyer  from  Portsmouth RI  on  October 17, 2020

    Describe the issue

    Switched to Amsoil 25-40 in my Mercruiser 454. It seems to hold better oil pressure than other oils I’ve used. I would recommend this oil.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 3
    Great Oil lousy Shipping
    By  Glen,  a  Verified Buyer  on  September 23, 2019

    Describe the issue

    This is some of the best oil available for Mercruiser engines that I have ever used. The three star rating is for the shipment. Half the bottles were leaking oil from the caps. Enough to soak thru the boxes. Neighbor had the same problem with motor oil delivery.
  • 5
    Great value
    By  Bryan,  a  Verified Buyer  on  July 17, 2019

    Describe the issue

    Great value
  • 5
    25W-40
    By  Bob,  a  Verified Buyer  from  Spicer, MN  on  December 10, 2018

    Describe the issue

    We use this product for a 60HP Mercury 4-stroke outboard motor. Love the product, and it is a great value also!
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great oil as usual
    By  jherm1,  a  Verified Buyer  from  charlotte, nc  on  October 05, 2017

    Describe the issue

    switched over from mercury oil to this...amsoil is the only oil I use for everything
  • 5
    Great for my boat
    By  Runky,  a  Verified Buyer  from  Portsmouth, RI  on  July 27, 2017

    Describe the issue

    Switched my marine big block over to Amsoil 25w-40 and have seen better oil pressure and increased performance over 30w oil. I'll definetly use this oil again.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Awesome
    By  gofastman,  a  Verified Buyer  from  Maplesville Alabama  on  February 10, 2017

    Describe the issue

    I purchased tis for my mercury, and i cant say enough about it, I have enjoyed using the amsoil product in everything i have and i will continue the use of it
  • 5
    Great product.
    By  Jeff,  a  Verified Buyer  from  Kalispell mt  on  August 29, 2016

    Describe the issue

    I ran this in my mercury optimax 125. It ran cleaner and smoother than when running on the mercury oil!
    Bottom Line
    Yes, I would recommend this to a friend.