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Marine / Watercraft

Marine/Watercraft Products

Premium API CJ-4 Synthetic 15W-40 Diesel Oil
Superior Shear Stability and Extended Drain Intervals in Ultra-Low Emission Diesel Engines
The premium choice diesel oil for model-year 2007 and newer heavy-duty and pickup truck diesel engines requiring API CJ-4 emission-quality oil standards. Delivers extraordinary lubrication in diesel engines in commercial, fleet and personal applications. Exceeds modern specs for emission-quality diesel oil.

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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.

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AMSOIL OE 15W-40 Synthetic Diesel Oil provides excellent protection and performance in both on- and off-road diesel engines for the original equipment manufacturer’s recommended drain interval. It meets API CJ-4 specifications and is suitable for both modern and older diesel applications.

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Oil Analysis

Visit Online Store - Product Code: OAI

Imagine being able to see exactly what’s happening inside an engine, a gearbox or hydraulic system. OIL ANALYZERS Fluid Analysis is a preventive maintenance tool that provides a picture of both the fluid condition and the internal condition of a component or system without the need to disassemble.

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Filters (EAO)

Visit Online Store - Product Code: EAO

EAOEa Oil Filters feature synthetic nanofiber technology for maximum efficiency. Guaranteed for up to 15,000 miles or up to 25,000 miles, depending on application, when used with AMSOIL synthetic motor oil.

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AMSOIL By-pass Oil Filters

Visit Online Store - Product Code: EABP90-EA


The Ea By-Pass Oil Filter (EaBP) provides the best possible filtration protection against wear and oil degradation. Working in conjunction with the engine’s full-flow oil filter, the AMSOIL Ea By-Pass Filter operates by filtering oil on a “partial-flow” basis. It draws approximately 10 percent of the oil pump’s capacity at any one time and traps the extremely small, wear-causing contaminants that full-flow filters can’t remove. The AMSOIL Ea Bypass Filter typically filters all the oil in the system several times an hour, so the engine continuously receives analytically clean oil.

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AMSOIL Synthetic Water Resistant Lithium-Complex Grease (GWR) resists water washout and degradation. Unparalleled protection for boat trailer wheel bearings and other components frequently exposed to water. Stays in place, lubricates and protects against rust.

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Reduces friction and wear in high-speed, high-temperature components like wheel bearings and electric motors. Keeps components running clean and trouble free for outstanding performance and long life. NLGI #2 is the primary wheel bearing recommendation.

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Super long life fluid – 750,000 miles/7 Years of service in over-the-road trucks & 250,000 mile/7-Year service life in light-truck and auto applications. Essentially nontoxic & biodegradable. Superior performance in all climates. Contains corrosion inhibitors & anti-foam agents.

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Improves combustion efficiency to increase power in diesel engines. Raises cetane three to seven numbers. Also improves low-temperature starting, fuel ignition quality and reliability. Treats up to 160 gallons. For use in any diesel-fueled engine.

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Total system cleaner and lubricity improver for all types of diesel engines. Improves performance and longevity of diesel engines while reducing deposits, black smoke and emissions. Improves fuel economy by cleaning dirty injectors. Restores horsepower. Designed for heavy-duty diesel engines.

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AMSOIL Diesel Concentrate Plus Cold Flow Improver is formulated with excellent detergency properties to help keep injectors, rings, piston crowns and the fuel pump lubricated, plus lowers the cold flow filter plugging point (CFPP) by as much as 34 F (19 C) in ultra-low sulfur diesel.

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>AMSOIL Diesel Recovery quickly dissolves gelled fuel, thaws frozen fuel filters and reduces the need for a new filter, saving both money and an inconvenient trip to a parts store. Performs well in all diesel fuels, including ULSD, off-road and biodiesel. Cheap insurance against frozen fuel.

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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.

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Excellent for all outboard motors with a performance emphasis on modern direct-fuel-injected (DFI) technology. Also recommended for personal watercraft, jet boats, motorcycles, snowmobiles and ATVs. Injector use or 50:1 premix.

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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.

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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 nboard engines. Also excellent for personal watercraft

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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 nboard engines. Also excellent for personal watercraft.

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Engine Fogging Oil (FOG)

Visit Online Store - Product Code: FOGSC

A highly-effective rust preventative designed to protect internal engine components during storage or long periods of inactivity. Ideal for outboard motors, lawn and garden equipment, motorcycles, snowmobiles, ATVs, motor homes and generators or any equipment with a two- or four-stroke engine.

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High-performance 2-cycle oil with an emphasis on exhaust power valves. Contains high levels of detergent additives to prevent valve sticking. Replaces manufacturer-branded oils. Injector use or 50:1 premix. Excellent in snowmobiles, motorcycles, PWC, ATVs and jet boats.

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Racing 2-cycle oil with an emphasis toward high-horsepower and modified racing or trail motors. Contains higher viscosity base oils for best overall protection and additives for higher operating temperatures. Injector use or 50:1 pre-mix. For snowmobiles, motorcycles, ATVs, PWC, go-carts and racing outboard motors.

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Gasoline Stabilizer

Visit Online Store - Product Code: ASTCN-EA

Reduces the oxidation process that occurs when fuel is stored for extended periods to prevent the formation of varnish and sludge which can clog injectors, stick floats and cause poor engine performance. Ideal for stored seasonal equipment such as snowmobiles, lawnmowers, motorcycles and boats.

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This lookup guide will return the recommended AMSOIL products (oils, filters and spark plugs) for your motorcycle, personal watercraft, snowmobile, and ATV. Please select the type of product you are interested in, then specify your vehicle using the drop-down menus. When you are ready, click the button to retrieve the list of products for your vehicle. Click Here to use the PowerSports – Online Lookup Guide

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The Ea By-Pass Oil Filter (EaBP) provides the best possible filtration protection against wear and oil degradation. Working in conjunction with the engine’s full-flow oil filter, the AMSOIL Ea By-Pass Filter operates by filtering oil on a “partial-flow” basis. It draws approximately 10 percent of the oil pump’s capacity at any one time and traps the extremely small, wear-causing contaminants that full-flow filters can’t remove. The AMSOIL Ea Bypass Filter typically filters all the oil in the system several times an hour, so the engine continuously receives analytically clean oil.

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Marine / Watercraft