Synthetic Motorcycle Oils
AMSOIL 20W-50, 10W-40, 10W-30 and SAE 60

Superior Wear Protection for Motorcycles.

AMSOIL Synthetic Motorcycle Oils 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. Tests prove these independent and exclusive AMSOIL formulations provide second-to none Viscosity protection for hot-running American and foreign motorcycle engines, transmissions and primary chain cases. (See Shear Viscosity Charts below.) AMSOIL 20W-50 Synthetic Motorcycle Oil (MCV) is recommended for Harley-Davidson, Buell, KTM, Ducati, BMW, Aprilia and Triumph motorcycles calling for a 15W-50 or 20W-50 viscosity, providing superior protection in engines, transmissions and primary chain cases. AMSOIL 10W-40 Synthetic Motorcycle Oil (MCF) is recommended for Honda, Kawasaki, Yamaha, Suzuki, Victory, BMW and Husqvarna motorcycles calling for a 10W-40 or 20W-40 viscosity, providing superior protection in engines and transmissions. AMSOIL 10W-40 Synthetic Motorcycle Oil is also an exceptional product for any two-cycle motorcycle transmissions requiring a 10W-40 lubricant. AMSOIL 10W-30 Synthetic Motorcycle Oil (MCT) is recommended for Honda, Yamaha, Suzuki and Kawasaki motorcycles and scooters, providing superior protection in engines and transmissions.

MAXIMUM TRANSMISSION PROTECTION
AMSOIL Synthetic Motorcycle Oils not only provide superior protection for motorcycle engines, they also provide superior gear protection, meeting API GL-1and SAE 80 (MCT), SAE 80W-90 (MCF) and SAE 90 (MCV) gear lube requirements. 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.

EXCELLENT WET-CLUTCH PERFORMANCE
Many motorcycles use 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.

SUPERIOR 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. The Foam Tendency Test (ASTM D-892) is divided into three sequences. In each sequence, air is bubbled through the oil for five minutes and the foam generated is measured in millimeters immediately following the test. At the end of the sequence, the oil is allowed to settle for 10 minutes and the remaining foam is measured again. The photos at right show AMSOIL 20W-50 and Lucas High Performance Motorcycle Oils before one sequence of the Foam Tendency Test and five minutes after completion of that sequence. 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.

EXCELLENT WEAR PROTECTION
AMSOIL Motorcycle Oils are formulated with robust anti-wear additive packages to provide superior wear protection and longer equipment life. They are designed to withstand the hard-pounding, high-revving environment found inside motorcycle engines. AMSOIL Motorcycle Oils provide dependable protection for virtually all motorcycles.

COST EFFECTIVE
AMSOIL Synthetic Motorcycle Oils provide excellent cost-effectiveness and are cost competitive with competing high end motorcycle oils. The premium 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.