Japanese Automobile Standards Organization (JASO)
The Japanese Automobile Standards Organization (Japanese Automotive Standards Organization. The primary automotive standards organization in Japan. JASO was created to better address the unique specification needs of Japanese engines.), is an industry organization and specification setting body for lubricants designated for use in a broad range of Japanese hardware. JASO small engine specifications are broadly recognized and have been adopted globally by the industry as key performance standards for both 2-stroke and 4 stroke applications. The JASO standards are used by oil marketers and many OEMs globally as an indication of the baseline performance upon which their performance requirements are built. The JASO emblem and associated specifications displayed on oil containers assist consumers with identifying the correct lubricants for motorcycles and other small engine equipment.
For 4-Stroke applications, JASO introduced the T903 specification in 1998 as a global standard. The specification was designed to address clutch slippage problems in the field, provide the correct balance between hardware durability and catalyst protection, and to improve fuel economy performance in scooter applications. This was in direct response to industry concerns relating to the incorrect use of lower A measure of a fluid's resistance to flow. A fluid with a higher viscosity flows less easily. and highly The resistance to motion of one object over another. Friction depends on the smoothness of the contacting surfaces, as well as the force with which they are pressed together. modified lubricants in wet-clutch motorcycle applications, and a need to upgrade the quality of four-cycle motorcycle lubricants available in the market.
For 2-Stroke applications, JASO introduced the M345 specification in 1994 as a global standard. The specification was designed to set a minimum level of engine protection and exhaust Mobile sources - Pollutant exhaust gases created by the combustion of fuel. Water and CO2 are not included in this category, but CO, NOx, and hydrocarbons are and are thus subject to legislative control. All three are emitted by gasoline engines, while diesel engines also emit particulates that are regulated. Stationary sources - The release of sulfur oxides and particulates from power stations that can be influenced by fuel composition. Local authorities control the sulfur content of heavy fuel oils used in such applications. control performance, in response to industry concerns about the durability of two-cycle engines and quality of two-cycle lubricants available in the market.