Motorcycles

AMSOIL Synthetic Products are formulated with premium synthetic base stocks and high performance additive technology that provide superior multi-functional benefits for the special requirements of motorcycle applications.

Motorcycle manufacturers want the best protection possible for their equipment, calling for rugged oils that exhibit high temperature deposit control additives. AMSOIL Synthetic Motor Oils are specially formulated with the best synthetic basestocks and high performance additives to provide tough lubricating protection for all four-cycle motorcycle engines in the most demanding operations.

AMSOIL Synthetic Motor Oils are formulated for both water-cooled engines and the unique demands presented by air-cooled V-twin motorcycle engines, including Harley-Davidson. Conventional petroleum oils break down and oxidize when faced with high temperatures, such as those experienced when idling in traffic, contributing to the formation of deposits, sludge and varnish. AMSOIL withstands oil breakdown and oxidation in high temperatures, holds contaminants in suspension and keeps engines running cool and clean.

Motorcyclists will find no better oils than AMSOIL Synthetic Motorcycle Oils

Viscosity is the most important characteristic of a lubricant. Motorcycle gears create a shearing effect that causes permanent oil viscosity loss. This thinning effect reduces the oil’s ability to prevent metal-to-metal con­tact and wear. AMSOIL Synthetic Motorcycle Oils exhibit absolute shear stability as measured by the industry recognized Kurt Orbahn shear stability test (ASTM D-6278). They provide superior protection com­pared to competitive oils and eliminate the need for sep­arate gearbox or chaincase oils.

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The high temperatures and tight tolerances common to motorcycle applications also affect viscosity. The High Temperature/High Shear (HTHS) Test (ASTM D-4683) measures a lubricant’s viscosity under severe high temperature and shear conditions. The more resistant an oil is to high-temperature viscosity loss, the better it protects, and even a HTHS differ­ence of 0.1 cP makes a significant difference.

AMSOIL Synthetic Motorcycle Oils exhibit the high­est HTHS viscosities of competing synthetic and con­ventional motorcycle oils. They provide the best high-temperature viscosity protection, giving motorcycle owners peace-of-mind during extensive idle times or when riding in hot weather conditions.

EXCELLENT WET-CLUTCH PERFORMANCE

Many motorcycles utilize a clutch that is immersed in the motor oil. The friction modifiers present in many automotive motor oils and the extreme pressure additives present in EP gear lubricants produce a low coef­ficient of friction between the clutch discs and plates, resulting in clutch slippage and glazing. Slippage leads to increased operating temperatures and reduced clutch life. AMSOIL Synthetic Motorcycle Oils are formulated without friction modifiers, providing positive clutch engagement, longer equipment life and reduced temperatures. AMSOIL Synthetic Motorcycle Oils meet the clutch compatibility requirements mandated by JASO MA/MA2 and ISO standard ISO-L-EMA2.

EXCELLENT CORROSION PROTECTION

Most motorcycles spend the majority of their lives either parked or in storage, but most motorcycle oils fail to address corrosion problems. Corrosion protection during storage and in humid conditions is essential to extending equipment life. AMSOIL Synthetic Motor­cycle Oils are formulated with specialized additive tech­nology that not only protects against corrosion and acids during operation, but also provides exceptional protection during storage. The ASTM D-1748 Rust Test measures a lubricant’s ability to protect against rust and corrosion. A standard metal reference coupon is immersed in the test oil before being placed in a humid­ity cabinet for 24 hours at 120° F. As seen in the photos, the reference coupon treated with AMSOIL 20W-50 Synthetic Motorcycle Oil showed no signs of rust and corrosion, while the competitor failed the test.

OUTSTANDING HEAT RESISTANCE

Motorcycles operate in demanding, high-heat condi­tions that require robust high-temperature deposit con­trol additives. While many conventional oils break down and oxidize when faced with high temperatures, causing formation of carbon and sludge deposits, AMSOIL Synthetic Motorcycle Oils effectively with­stand oil breakdown and oxidation, keeping equipment running cooler and minimizing oil consumption, thick­ening and emissions. Air-cooled engines get especially hot while idling in traffic, commonly reaching tem­peratures of 270° F or higher. The extra margin of pro­tection provided by AMSOIL Synthetic Motorcycle Oils is especially important for hot-running air-cooled motor­cycle engines.

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FOAM CONTROL

High engine speeds and transmission gears in motorcycles churn the oil, suspending air and causing foam. When this oil and air mixture is drawn into a loaded area, the air compresses and decreases the thickness of the oil film, compromising wear protection. In addition, suspended air promotes oil oxidation, reducing its service life. AMSOIL Synthetic Motorcycle Oils provide outstanding foam control and are formulated with anti-foam agents that allow for quick air release. They provide long term lubricating protection in high speed, high RPM conditions.

UNSURPASSED WEAR PROTECTION

The Four Ball Wear Test (ASTM D-4172) determines the wear protection properties of a lubricant. The smaller the average wear scar, the better the wear protection provided by the lubricant. AMSOIL Synthetic Motorcycle Oils produce significantly smaller wear scars than competing motorcycle oils, providing unsurpassed protection against engine wear, reducing main­tenance costs and extending equipment life.

COST EFFECTIVE

AMSOIL Synthetic Motorcycle Oils provide excellent cost effectiveness and are cost competitive with competing high-end motorcycle oils. The unmatched protection and performance provided by AMSOIL Synthetic Motorcycle Oils is excellent insurance for today’s expensive motorcycles and custom bikes.

AMSOIL Synthetic Motorcycle Oils are recommended for twice the manufacturer’s recommended drain interval for on-road motorcycles.

Harley Davidson

Harley-Davidson Confirms To AMSOIL That The Use Of Synthetic Motor Oils Other Than Harley-Davidson Oil Does Not Void Warranty Coverage - HD Warranty Addendum

AMSOIL Recommendations for All Harley-Davidson® Models View it. Download it.

Street Bikes

Motorcycle manufacturers want the best protection possible for their equipment, calling for rugged oils that exhibit high temperature deposit control additives. AMSOIL Synthetic Motor Oils are specially formulated with the best synthetic basestocks and high performance additives to provide tough lubricating protection for all four-cycle motorcycle engines in the most demanding operations.

Dirt Bikes

AMSOIL Synthetic Oils provide maximum protection and performance in all gasoline engines. AMSOIL Synthetic Oils reduce engine operating temperatures, increase power output and keep engines cleaner than petroleum oils. AMSOIL Synthetic Oils also provide maximum oxidation protection, anti-corrosive characteristics and improved operation in low temperatures.