Japanese Automotive Standards Organization

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"JASO" redirects here. For the Greek goddess, see Iaso.

The Japanese Automotive Standards Organization (日本自動車規格 Nihon Jidōsha Kikaku?, JASO) is an organization that sets automotive standards in Japan, analogous to the Society of Automotive Engineers (SAE) in the United States. JASO also sets standards for grades of oil; the highest grade for two-stroke engines being JASO FD, and JASO MA for four-stroke engines (motorcycles).

JASO is part of the Society of Automotive Engineers of Japan (財団法人自動車技術会 Zaidan-hōjin Jidōsha Gijutsukai?, JSAE).

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