BS ISO 6743-15:2007

Lubricants, industrial oils and related products (class L). Classification. Family E (Internal combustion engine oils) | Status: Confirmed, Current

1 Scope This part of ISO 6743 establishes the detailed classification, in tabular form, of engine lubricating oils for use in the following internal combustion engines:

1. a) 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);
2. b) 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 in Annex A. It is expected that this part of ISO 6743 be read in conjunction with ISO 6743-99[1].