AMSOIL Synthetic Motorcycle Oils Are Ideal For Motorcycles
AMSOIL Official Oil of the Sturgis Motorcycle Rally
AMSOIL is now the Exclusive Official Oil of the Sturgis Motorcycle Rally. Sturgis is one of the biggest events for motorcyclists, with more than 500,000 riders attending the rally each year. Visit the AMSOIL booth on Main Street west of Junction Avenue or visit our oil change facility in the Pamida parking lot on Lazelle Street.
Glen Cove, NY Motorcycle owner Ed Nasalgia, a 40 year motorcyclist bought a Honda Goldwing brand new in 1983. With 600 miles on it he installed AMSOIL Synthetic 10W-40 Oil. He now uses AMSOIL 10W-40 Synthetic Motorcycle Oil.
Ed's Goldwing now has 144,000 mi. on the odometer, Ed says, "I never have to add oil to it. Even after putting 18,000 miles on it last summer, the oil level was still in the safe zone this spring. The engine has never been taken apart for any work and it still runs extra smooth and feels very powerful."
20W-50 Synthetic Motorcycle Oil Wear Comparison ASTM Test Method D-4172 March 16, 2005
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Research Tests ran case by case comparisons of 15 top rated 40-weight and 50-weight oils formulated for motorcycle use, comparing 12 critical factors, ranging from Viscosity, Foam Control and Gear Performance to High Temperature Sheer Viscosity, Sheer Stability and Price. Several of the top brands failed out of grade even before the end of a typical testing cycle. AMSOIL's synthetic motorcycle oils graded out near the top in every category, and absolutely provided the best performance per dollar spent.

AMSOIL Synthetic Motorcycle Oils have been carefully engineered with high performance additives, which provide deep and broad coverage for the unique requirements of an oil working in a high RPM motorcycle engine, exposed to the air and road grit. In particular, AMSOIL synthetics have unparalleled high temperature viscosity properties, perfect for hot-running American and foreign motorcycle engines, transmissions and chain cases. Two high performance AMSOIL Synthetics are 10W-40 and 20W-50. These high performance motorcycle oils work through a high range of temperatures, and excel at high temperature applications, retaining viscosity to unprecedented temperatures. These oils can be used in all motorcycle engines, including those with a wet clutch system, requiring an API CD, SG-CG or SH-CD oil.
High test motor oils provide protection for the moving parts of your motorcycle engine. High performance synthetic 10W-40 and 20W-50 oils have an anti-wear additive with high levels of zinc and phosphorous for superior protection of the critical parts of your engine, including cam lobes and other high-pressure parts. The AMSOIL 20W-50 Motorcycle High Performance Synthetic contains more zinc and phosphorous than most popular motorcycle manufacturer motor oils. Because of this wear protection additive with zinc and phosphorous, the AMSOIL High Performance Synthetics of either weight are ideal for use in a shared oil sump bike, where the engine oil provides wear protection to the transmission gearing. These applications involve high RPMs and surface tension, where the AMSOIL products excel at protecting your engine.
While some conventional motor oils, and nearly all synthetics have friction modifiers, and temperature regimes where they offer sub-optimal performance, AMSOIL High Performance Synthetic 20W-50 and 10W-40 Motorcycle Motor Oils go without, making it ideal for motorcycle engines. This ensures dependable starts, smooth operations and good fuel efficiency for your motorcycle.
Running a motor at extremes of temperature, high or low, puts a burden on your lubricant. AMSOIL 10W-40 and 20W-50 High Performance Synthetics offer lubrication and protection at both very low temperatures, and at high engine operating temperatures; like most synthetic oils, its temperature range covers the gamut of extremes, maintaining excellent fluidity for easy cranking on cold days, dependable startups, and fast post-startup protection. At high temperatures, it provides a clean protective film of oil to keep things running smoothly during the high-stress operations typical of high performance motorcycle engines. AMSOILs' 10W-40 and 20W-50 oils are excellent at prevention of sludge, deposits and varnish, having superior performance and less breakdown compared to conventional pils, enduring clean, dependable performance.
AMSOIL High Performance Synthetic 10W-40 Motorcycle Motor Oil meets the cu rrent API and SAE requirements (as labeled) and are perfectly suited for use in any new vehicle stipulating those requirements, and will not void its warranty.l

AMSOIL High Performance Synthetic 10W-40 and 20W-50 Motorcycle Motor Oils are formulated for extended drain intervals. Length of service depends on application.
Change our motorcycle oils at three times the engine manufacturer's recommended drain interval or one year, whichever comes first.
AMSOIL INC. warrants that the use of its products will not cause mechanical damage to any mechanically sound equipment when AMSOIL INC. products are used in full compliance with AMSOIL INC. recommendations.
The Air Filter is the Most Important Filter on Any Vehicle; Motorcycles are No Exception
Most contaminants enter the engine through the air intake. AMSOIL Ea Motorcycle Air Filters provide superior air filtration performance. Their synthetic nanofiber media traps and holds more wear-causing dirt particles than K&N and Harley-Davidson filters while maintaining improved airflow for maximum performance and fuel economy.
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AMSOIL provides Ea Motorcycle Air Filters for Harley-Davidson, Honda GoldWing and virtually all other domestic and metric applications, plus specialty filters for Baron Big Air Intake and S&S Carburetor Systems.
AMSOIL penetration into the motorcycle market has been impressive. There is no reason every bike protected with AMSOIL Synthetic Motorcycle Oils can't also be equipped with AMSOIL Ea Air and Oil Filters.
Multiple V-Twin and Metric Applications Synthetic Nanofiber Media Maximum Airflow Maximum Capacity Extended Service Life
Studies on the ingestion of particulates show that increased dust passing the air filter results in additional engine wear. The greater efficiency of AMSOIL Ea air filters means fewer contaminants entering the engine.
Our Line of Premium Filters For Motorcycles From AMSOIL
Ea Motorcycle Oil Filters (EaOM) AMSOIL INC. revolutionized the filtration industry with its introduction of AMSOIL Ea Air and Ea Oil Filters. For the first time exclusive nanofiber technology – the same technology used in the Abrams M1 tank and other heavy duty applications – was made available for automotive applications. Now, AMSOIL has made this outstanding new technology available for motorcycles.
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Nanofiber Basics Because the nanofibers in AMSOIL Ea Motorcycle Oil Filter media are so small, there are more pores per square inch, allowing for higher dirt-holding capacity and lower pressure drop compared to traditional filter medias. Thinner media fibers produce more uniform pore size distribution, improving the filter's overall ability to capture and retain particles.
Oil Filtration Basics Clean oil is vital to engine performance and durability. Oil must lubricate, cool and clean the engine as it circulates. In order to remain effective, it must be filtered as it cycles. The filter is connected to the engine sump, which contains the oil pump. Full-flow filters pass all the oil output from the pump through the filter.
The function of the oil filter is to remove the contaminants introduced into the lubricating oil and prevent them from reaching sensitive engine parts without restricting normal oil flow to the various points requiring lubrication. Internal sources of contamination include wear products from the rubbing surfaces of the engine, blow-by gases leaking past the rings of the pistons and degradation of the oil itself. A filter must perform well in the areas of efficiency, capacity, flow and life.
Ea Motorcycle Oil Filters Ea Motorcycle Oil Filters feature a specially constructed silicone anti-drainback valve and a nitrile sealing gasket to go along with the full-synthetic Ea nanofiber media. The anti-drainback valve provides excellent protection during startup and remains flexible in all temperatures, and the nitrile sealing gasket resists chemical breakdown, providing excellent durability and ensuring long filter life. AMSOIL Ea Motorcycle Oil Filters are fluted for easy removal from the motorcycle and are available in a chrome-plated alternative to the normal black filters.
Superior Filtration The unique construction and full-synthetic media of AMSOIL Ea Motorcycle Oil Filters allow them to provide unmatched performance in motorcycles and other power sports equipment. EaOM Filters last longer, stop smaller dirt particles and offer less restriction than other filters. Ea Motorcycle Oil Filters provide filtering efficiency of 98.7 percent at 15 microns, outperforming the best cellulose/synthetic blend media on the market. For maximum engine protection, AMSOIL recommends changing the EaOM every time you change oil.
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