標準號：ISO 24254-2007
中文標準名稱：潤滑劑、工業用油和相關產品(L級).E族(內燃機油).四沖程循環摩托車汽油發動機和相關動力傳動系統用油的規范(EMA和EMB類)
英文標準名稱：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)
標準類型：E30
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：E30
國際標準分類號：75.100
適用范圍：This International Standard 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 commonsump 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-strokeengine oils is defined in ISO 6743-15 [1]. Among all of the categories covered by ISO 6743-15, thisInternational Standard includes categories EMA and EMB.This International Standard specifies the performance classification of four-stroke cycle gasoline engine oilsbased on physical and chemical properties, and three friction performance indices, which are derived from thefrictional properties of the lubricant, according to the JASO T904 test procedure1).NOTE For the purposes of this International Standard, the term “% (m/m)” is used to represent the mass fraction.