Learn the facts that the Motorcycle manufacturers and the oil industry don't want you to know! The Motorcycle manufacturers need to sell you motorcycles, that's their business. Each Motorcycle maker has product planned obsolescence built into their business plan. They won't tell you about or recommend AMSOIL because your motorcycle engine would last twice as long, that's not in their business interest! Also they make a tremendous profit on the 10 cent OEM oil that they sell (that's what it costs to manufacture). This OEM oil provides two functions, it keeps your motorcycle on their planned schedule for repairs and wearout and it adds a tremendously profitable add-on sale. So recommending an oil that would make their motorcycles last longer and reduce their oil sales would be counter-productive to their business plan.   AMSOIL High Performance Synthetic 10W-40 and 20W-50 Motorcycle Motor Oils are designed to provide maximum benefits in gasoline and diesel engines. Ideal for motorcycles and wet clutch performance. AMSOIL High Performance Synthetic 10W-40 and 20W-50 Motorcycle Motor Oils may be used in gasoline engines requiring oils meeting the following specifications: Harley Davidson owners read this! AMSOIL vs Screamin' Eagle Synthetic Oil AMSOIL PDF Motorcycle Filter Guide    API SJ, SH, SG, SF, CH-4, CG-4, CF-2, CF, CD      ACEA A2, A3, B2, B3, E2, E3      Chrysler MS 8809A      Cummins CES 20071, 20072, 20076      Ford ESR M2C 179A      Mercedes-Benz 226.1, 227.1, 228.1, 228.3      Mack EO-L, EO-M, EO-M+      Volvo VDS, VDS-2      Volkswagon 501.01, 505.00      Allison C-3, C-4      Caterpillar TO-2, TO-3 Techical Properties of AMSOIL Motorcycle Oils PRODUCT DESCRIPTION AMSOIL High Performance Synthetic 10W-40 and 20W-50 Motorcycle Motor Oil is specifically formulated to provide tough lubricating protection in the most demanding operations. It is recommended for use in motorcycles, and other high-stress vehicles. AMSOIL SAE 10W-40 and 20W-50 High Performance Synthetic Motorcycle Motor Oils may be used in all motorcycle engines, including those with a wet clutch system, requiring an API CD, SG-CG or SH-CD oil. WEAR PROTECTION The AMSOIL High Performance Synthetic 10W-40 and 20W-50 Motorcycle Motor Oils anti-wear additive package contains high levels of zinc and phosphorous for superior protection of cam lobes and other high-pressure parts. In fact, AMSOIL High Performance Synthetic 20W-50 Motorcycle Motor Oil contains more zinc and phosphorous than most popular motorcycle manufacturer motor oils. Its superior anti-wear package offers superior wear protection.  AMSOIL High Performance Synthetic 10W-40 Motorcycle Motor Oil leaves a wear scar up to 38 percent smaller than the scars left by other popular brands in the ASTM D4172 Four-Ball Wear Test. Some motorcycle transmissions and engines share an oil sump, so the engine oil also provides wear protection to the transmission gears.  AMSOIL High Performance Synthetic 10W-40 and 20W-50 Motorcycle Motor Oils offer superior wear protection to transmission gears, which are often subjected to high surface pressure and rotation speed. It also promotes proper wet clutch performance. FRICTION MODIFIER FREE AMSOIL High Performance Synthetic 10W-40 Motorcycle Motor Oil contains no friction modifiers, making it ideal for motorcycle engines.  The friction modifier free formulation of AMSOIL High Performance Synthetic 10W-40 Motorcycle Motor Oil ensures dependable starting, smooth running, good fuel efficiency, desirable stall speeds and clutch compatibility. TEMPERATURE AND PERFORMANCE AMSOIL High Performance Synthetic 10W-40 and 20W-50 Motorcycle Motor Oils offer the superior protection and lubrication at high and low temperatures found only in top-quality synthetic oils.  Its outstanding low temperature fluidity ensures easy cranking, dependable starting and fast post-startup protection.  Its superior high-temperature protection ensures the formation of a clean, protective film of oil between working parts during high-temperature, high-stress operations. High-temperature operations often lead to the thermal degradation and oxidation of conventional oils, which leads to the formation of deposits, sludge and varnish. AMSOIL High Performance Synthetic 10W-40 and 20W-50 Motorcycle Motor Oils withstand thermal degradation and oxidation at higher temperatures than conventional oils do, ensuring clean, dependable performance in high-stress, high temperature operations.  NEW VEHICLES UNDER WARRANTY AMSOIL High Performance Synthetic 10W-40 and 20W-50 Motorcycle Motor Oils will not void new vehicle warranties. New vehicle warranties are premised on the use of oils meeting specific API service classifications and SAE viscosity grades. AMSOIL High Performance Synthetic 10W-40 Motorcycle Motor Oil meets the current API and SAE requirements (as labeled) and are perfectly suited for use in any new vehicle stipulating those requirements. SERVICE LIFE AMSOIL High Performance Synthetic 10W-40 and 20W-50 Motorcycle Motor Oils  are formulated for extended drain intervals.  Length of service depends on application. MOTORCYCLES, ALL-TERRAIN VEHICLES, ETC. Change AMO at three times the engine manufacturer's recommended drain interval or one year, whichever comes first. AMSOIL PRODUCT WARRANTY 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. Click here for details. NEW Line of Premium Motorcycle Filters From AMSOIL AMSOIL INC., Superior, WI, has introduced a full line of premium filters specifically designed for motorcycles. AMSOIL SuperDuty Motorcycle Oil Filters reflect the latest technological advances. The spin-on type filters are available in either black or chrome. AMSOIL SuperDuty Motorcycle Filters are designed to allow the proper volume of oil flow with a minimum degree of restriction while efficiently removing the contaminants that cause wear. AMSOIL filters are comprised of a blend of synthetic, cellulose and glass media, tested to provide superior, reliable overall performance. AMSOIL SuperDuty Motorcycle Oil Filters offers the following benefits: Traps dirt through out media thickness More than 75% better combined efficiency/capacity rating Heavy duty steel case for rugged performance in extreme conditions Prevents oil drainage during engine shutdown Double-rolled tuck lock seam prevents leakage in high pressure situations Emergency relief valve prevents oil starvation