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When only the BEST will do
AMSOIL Marine Oil

Best 2 Stroke and 4 Stroke Dirt Bike Oil


Why AMSOIL? | The introduction of the world’s first synthetic motor oil to meet American Petroleum Institute service requirements in 1972 set all-new standards for motor oil quality. AMSOIL synthetic motor oil outperformed conventional petroleum motor oils on all counts. It was clear from the start that this innovative product would play a major role in engine performance and engine life.

As the technology used in today’s marine applications has evolved, AMSOIL has remained ahead of the curve in performance and protection with products formulated to deliver clean engine performance and control harmful deposits, wear and rust. AMSOIL synthetic lubricants are engineered to protect your watercraft in all conditions so you can remain carefree and on the water longer.

Premium Protection for Marine Applications


Boating and fishing are popular activities for people across the nation, with the 2013 Special Report on Fishing and Boating indicating that 47 million Americans went fishing in 2012, 46.8 million participated in a boating activity and 21.2 million owned a boat.


Boat Engine Options


Boat applications can be broken down into four primary methods of propulsion. Available in both two- and four-stroke designs, outboard motors are self-contained units (engine, gearbox and propeller/jet drive) that mount outside the hull of the boat; inboard motors are enclosed within the hull; sterndrive (inboard/outboard) designs situate the engine forward of the transom, with the drive unit outside the hull; and jet motors propel the boat by drawing water into a pump and ejecting it out the stern. According to the 2013 Special Report on Fishing and Boating, 53.1 percent of boats are powered by outboard motors, while 16 percent feature inboard motors, 15 percent have sterndrive motors, 3.3 percent have jet motors and 12.7 percent are not motorized.


AMSOIL Products for Marine Applications


A successful day fishing or boating hinges on the reliability of marine engines. Deposits and wear from high-rpm operation and all-day trolling can limit performance and even shorten engine life, especially in newer engines that run hotter and produce more power. AMSOIL synthetic marine lubricants, including Formula 4-Stroke® Marine Synthetic Motor Oil (WCT, WCF) and HP Marine™ Synthetic 2-Stroke Oil (HPM), are formulated to control harmful deposits and wear in outboard, inboard and sterndrive motors. AMSOIL products are ideal for boaters because they effectively reduce time and money spent on maintenance and increase fuel economy. In fact, research reveals maintenance and fuel costs are foremost on the minds of boaters. The top three reasons ex-boaters cited for giving up their boats are cost of maintenance/ storage (41.1%), cost of fuel (21.5%) and time constraints (20.6%).


AMSOIL Products for Tow Vehicles and Trailers


Don’t forget about tow vehicles and trailers. AMSOIL offers not only premium synthetic marine oils for boat motors, but AMSOIL synthetic motor oils, diesel oils and drivetrain fluids for tow vehicles and Synthetic Water-Resistant Grease (GWR) for trailers. AMSOIL synthetic motor oils and diesel oils help reduce maintenance and downtime and extend drain intervals, allowing increased time on the water.


Marine Oil


Marine motors are characterized by high-rpm operation that can shear the molecular structure of oil and reduce its ability to protect against wear. “On average, a marine motor propelling a boat 30 mph operates at 5,000 rpm, while an automotive engine at 60 mph operates around 2,000 rpm. The added heat and stress invite wear and deposits,” said Len Groom, Technical Product Manager - Powersports. “Heavy deposits can cause piston rings to stick, particularly in two-stroke motors. Stuck rings lead to compression loss, which reduces power. Stuck rings can also lead to catastrophic piston scuffing.”Regardless of the application you are looking for, whether it is for a high performance ski-boat, bass boat, offshore race boat, or for an auxiliary engine on a sailboat, AMSOIL has a designed product that is engineered specifically for your application. AMSOIL has two high performance synthetic NMMA-approved 4-cycle Marine Engine Oils and several synthetic 2-cycle oils designed for specific applications, including jetskis, EFI and DFI outboard motors, and racing applications.

Regardless of the application you are looking for, whether it is for a high performance ski-boat, bass boat, offshore race boat, or for an auxiliary engine on a sailboat, AMSOIL has a designed product that is engineered specifically for your application. AMSOIL has two high performance synthetic NMMA-approved 4-cycle Marine Engine Oils and several synthetic 2-cycle oils designed for specific applications, including jetskis, EFI and DFI outboard motors, and racing applications.

List of AMSOIL Marine Products



Shop the AMSOIL online store by browsing from a list of products specifically selected for boats and personal watercraft applications. Select from synthetic 2-stroke and 4-stroke marine oils, marine gear lubes and greases, filtration products, fuel additives and much more. 





True marine gear performance. Provides superior protection from shock loading. Resists foam and retains extreme-pressure qualities even when subjected to 10% water contamination. For use in outboard lower units, sterndrives, V-drives, bow and tunnel thrusters and marine transmissions Excellent for use in ATVs.







Excellent for Evinrude® E-TEC™ factory-lean setting (replaces Evinrude XD100™ 2-Cycle Oil). Helps prevent deposits, protects against wear, has low smoke, protects against rust and has low aquatic toxicity. Superior performance as an injection oil or at 50:1 pre-mix.







Designed for pre-mix applications as lean as 100:1 ratios or richer. Improves throttle response and lowers or eliminates smoke. Minimizes deposit formation and lowers emissions. Performance emphasis on the cooler operations of water-cooled motors.







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.





For use in 4-stroke gasoline fueled engines in marine applications. Offers unsurpassed wear protection, viscosity stability, low volatility and excellent rust protection. NMMA FC-W approved and "warranty certified". For use in 4-stroke outboard and marine inboard engines. Also excellent for personal watercraft.







AMSOIL Synthetic 2-Stroke Injector Oil reduces wear and maximizes engine life. Its high lubricity and reliable film strength help protect against piston scuffing and bearing wear.








Engineered for pre-2007 diesel engines in on-road applications as well as all model year diesel engines in off-road applications. High 12 TBN controls acids from combustion blow-by and EGR. Additives control soot thickening, oxidation and wear. Extended drain capabilities reduce downtime and motor oil expenses.




Improves engine performance by removing gum, varnish and carbon deposits that affect power, operation, idle and fuel economy. Power Foam cleans intake valves, intake manifolds and throttle plates to keep the combustion intake system running at peak efficiency. Helps reduce engine ping and keeps carburetors and injector systems operating like new.





Removes performance-robbing deposits from diesel fuel injectors to restore horsepower and improve fuel economy. It is formulated for all types of diesel engines, including high-pressure common-rail designs. AMSOIL Diesel Injector Clean makes no sacrifices; it is purpose-built for diesel owners who demand maximum results.







Premium fuel additive formulated to thoroughly clean and restore peak performance in small engine and powersports equipment fuel systems.






CONTACT

 (757) 377-5823


 1400 Jury Road 
Chesapeake, VA, 23322
United States
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