The Japanese Automotive Standards Organization () is an organization that sets automotive standards in Japan, similar to the

Society of Automotive Engineers SAE International is a global professional association and standards organization based in Warrendale, Pennsylvania, United States. Formerly the Society of Automotive Engineers, the organization adopted its current name in 2006 to reflect bot ...

(SAE) in the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

. JASO establishes standards for various types of

engine oil Motor oil, engine oil, or engine lubricant is any one of various substances used for the lubrication of internal combustion engines. They typically consist of base oils enhanced with various additives, particularly antiwear additives, deter ...

, including the highest grade for

two-stroke A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston, one up and one down, in one revolution of the crankshaft in contrast to a four-stroke engine which re ...

engines, which is

JASO FD The Japanese Automotive Standards Organization () is an organization that sets automotive standards in Japan, similar to the Society of Automotive Engineers (SAE) in the United States. JASO establishes standards for various types of engine oil, i ...

, and

JASO MA The Japanese Automotive Standards Organization () is an organization that sets automotive standards in Japan, similar to the Society of Automotive Engineers (SAE) in the United States. JASO establishes standards for various types of engine oil, i ...

for

four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...

engines, such as those found in

motorcycles A motorcycle (motorbike, bike; uni (if one-wheeled); trike (if three-wheeled); quad (if four-wheeled)) is a lightweight private 1-to-2 passenger personal motor vehicle Steering, steered by a Motorcycle handlebar, handlebar from a saddle-style ...

. JASO is a part of the .

Classifications

It stipulates the lubricating oil requirements for 2-stroke gasoline engines, such as those used in motorcycles, general-purpose machines, and outboard motors, and was established in 1994. For 2-stroke oil, lubricity, cleanliness, exhaust smoke, and exhaust system blockage are evaluated using the test methods specified in JASO M 340, M 341, M 342, and M 343, resulting in the grades FB, FC, and FD. FA has been abolished. The performance classifications are as follows: * FA: Minimum performance for a 2-stroke engine. * FB: Superior lubricity and cleanliness compared to FA. * FC: Low smoke with excellent performance in reducing exhaust smoke and system blockage compared to FB. * FD: Enhanced cleaning performance at high engine temperatures compared to FC. Additionally, FB, FC, and FD are adopted as EGB, EGC, and EGD, respectively, in

ISO standards The International Organization for Standardization (ISO ; ; ) is an independent, non-governmental, international standard development organization composed of representatives from the national standards organizations of member countries. Me ...

References

External links

JASO standards

JSAE (parent organization)
Standards organizations in Japan Trade associations based in Japan Automotive standards {{Japan-org-stub

Classifications

See also

References

External links