ISO 6743-15:2007 establishes the detailed classification, in tabular form, of engine lubricating oils for use in the following internal combustion engines: two-stroke cycle, spark-ignition gasoline engines that employ a crankcase scavenging system and are used in transportation, leisure and utility applications, such as motorcycles, snowmobiles, chainsaws (hereinafter referred to as two-stroke engine oils) and in four-stroke cycle, spark-ignition gasoline engines that employ a common sump containing the lubricant for both the engine and the drive train/starter/transmission of motorcycles, motor scooters, all-terrain vehicles (ATVs) and related equipment (hereinafter referred to as four-stroke engine oils).Outboard motor and marine engine applications are described.It is expected that ISO 6743-15:2007 be read in conjunction with ISO 6743-99.