Japanese Automotive Standards Organization

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The Japanese Automotive Standards Organization (日本自動車規格 Nihon Jidōsha Kikaku?, JASO) is an organization that sets automotive standards, much like the Society of Automotive Engineers (SAE) does in the United States.

They also set standards for grades of oil. The highest grade of oil for two-stroke engines is JASO FC, for four-stroke engines (motorcycles) JASO MA.

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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