NF ISO 24254

Lubricants, industrial oils and related products (class L) - Family E (internal combustion engine oils) - Specifications for oils for use in four-stroke cycle motorcycle gasoline engines and associated drivetrains (categories EMA and EMB)

ISO 24254:2007 specifies the requirements of lubricating engine oils (hereinafter referred to as ?four-stroke engine oils?) to be used in four-stroke cycle spark ignition gasoline engines employing a common sump containing the lubricating oil for both the engine and associated drivetrain (transmission, clutch, starter) of motorcycles, motor scooters, all-terrain vehicles (ATVs) and related equipment. Classification of four-stroke engine oils is defined in ISO 6743-15. The performance requirements of four-stroke engine oils classified in all of the categories covered by ISO 6743-15, EMA and EMB, are embraced in this specification.

ISO 24254:2007 specifies the performance classification of four-stroke cycle gasoline engine oils, based on physical and chemical properties, and three friction performance indices, which are derived from the frictional properties of the lubricant, according to the JASO T904 test procedure.

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