ISO 24254:2007规定了四冲程循环火花点火式汽油发动机中使用的润滑机油（以下简称“四冲程机油”）的要求，该发动机采用一个通用油槽，其中包含摩托车、电动滑板车、发动机和相关传动系（变速箱、离合器、起动机）的润滑油，全地形车（ATV）和相关设备。ISO 6743-15中定义了四冲程发动机机油的分类。本规范包含ISO 6743-15、EMA和EMB涵盖的所有类别中四冲程发动机机油的性能要求。 ISO 24254:2007根据JASO T904试验程序，规定了基于物理和化学特性的四冲程循环汽油发动机机油的性能分类，以及根据润滑剂的摩擦特性得出的三个摩擦性能指数。

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.