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| AMSOIL Synthetic Motorcycle and ATV Oils
Superior Wear Protection for all of your PowerSports needs 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. These independent and exclusive AMSOIL formulations provide second-to-none viscosity protection for hot-running American and foreign motorcycle engines, transmissions and primary chaincases. AMSOIL Synthetic Motorcycle Oil Features • Excellent for roller bearings and does not cause “skate” or “float” in V-Twin Engines
• Prevents foaming in high-RPM engines
• Eliminates the need for multiple lubricants
• Absolute shear stability maintains protective viscosity in high heat, high shear conditions
• Better performance and price than competitive motorcycle oils
• Recommended for twice the manufacturer’s recommended drain interval for on-road motorcycles
• Provide exceptional protection against rust and corrosion during storage
• Robust anti-wear additive packages provide superior wear protection and longer equipment life 
 AMSOIL Synthetic Motorcycle Oils | Code: MCT | 10W-30 Advanced Synthetic Motorcycle Oil |
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 | AMSOIL Synthetic 10W-30 Motorcycle Oil is the result of extensive research, and it is specially formulated to excel in all areas unique to motorcycles, including high engine RPM, wet clutch lubrication, extreme pressure regions of gears and rust common to short drives and storage. Click Here For More Information or to Place an Order |
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| Code: MCF | 10W-40 Advanced Synthetic Motorcycle Oil |
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 | Advanced multi-functional formula for both domestic and foreign motorcycles. Recommended for high-performance liquid or air-cooled 4-stroke engines and transmissions and both 4- and 2-stroke motorcycles. Wet-clutch compatible. Not recommended where an API GL-4 or GL-5 gear oil is required. Click Here For More Information or to Place an Order |
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| Code: MCV | 20W-50 Advanced Synthetic Motorcycle Oil |
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 | Advanced multi-functional formula for both domestic and foreign motorcycles. Excellent in air-cooled motorcycle engines due to high heat resistance. Can be used in engines, transmissions and the primary chaincase. Not recommended where an API GL-4 or GL-5 gear oil is required. Click Here For More Information or to Place an Order |
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 Harley Owners AMSOIL 20W-50 Synthetic Motorcycle Oil vs. Harley-Davidson Screamin' Eagle Syn3 20W-50 Synthetic Motorcycle Oil
The introduction of Screamin' Eagle Synthetic Motorcycle Oil by Harley-Davidson signaled the Motor Companies acceptance of synthetic lubricants as superior performing products for their motorcycles. However, Harley-Davidson V-twin air cooled engines are not so unique in their lubrication requirements that they require a special Harley-only fluid. In fact, Four-Ball Wear Test results indicate that AMSOIL 20W-50 Synthetic Motorcycle Oil leaves a wear scar 40 percent smaller than Screamin' Eagle Syn3 20W-50 Synthetic Motorcycle Oil.
According to Harley-Davidson, one of the unique benefits offered by Screamin' Eagle Synthetic Motorcycle Oil is its versatility, recommending its use in the engines, primary chaincases and transmissions of most Harley-Davidson motorcycles, including Evolution XL, Evolution 1340, Twin Cam 88 and 88B, Revolution and Buell models. This feature, however, is not unique. AMSOIL 20W-50 Synthetic Motorcycle Oil may also be used in the engines, primary chaincases and transmissions of these applications, providing superior lubricating protection in each component.
Harley-Davidson Confirms To AMSOIL That The Use Of Synthetic Motor Oils Other Than Harley-Davidson Oil Does Not Void Warranty Coverage
 Harley-Davidson Motor Company
3700 West Juneau Ave., P.O. Box 653, Milwaukee, WI 53201 414/342-4680
January 31, 2003
Aaron Scanlon
AMSOIL Building
Superior, WI 54880
Dear Mr. Scanlon:
Thank you for your recent letter requesting information on Harley-Davidson's one-year, unlimited mileage warranty when Synthetic Lubricants are used.
Until now, the Motor Company has never supported the use of synthetic products in our vehicles because there had never been any test validations completed on the numerous formulations in HD/Buell motorcycles to determine the viability of using these products on Harley-Davidson products until now.
We have developed a specially formulated synthetic fluid called SYN3. This fluid can be used in Harley-Davidson engines, transmissions and primary chaincases. This product had been exclusively designed for Harley-Davidson and is the only synthetic product tested and certified by Harley-Davidson engineering for use on HD/Buell motorcycles.
The use of a different brand of fluid does not void the one-year, unlimited mileage warranty unless it can be confirmed that the use of such products was the cause of the failure.
Thank you, Mr. Scanlon, for taking the time to write to Harley-Davidson and allowing me to answer your questions.
Sincerely,
Lisa Sagen
Powertrain Customer Service
Two-Stroke Engine Applications and Lubrication Needs Known for their excellent power-to-weight ratio, two-stroke engines have proven effective and popular for most of the last 100 years. Although pollution concerns have driven the small engine industry to four-stroke engines, they have also helped pave the way for cleaner, more efficient two-stroke motors. Two-stroke engines have design differences and operate under conditions that require different oil chemistries than their four-stroke counterparts. READ MORE HERE: Click HERE for more information on all
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