What is ILSAC?

2 Answers
DiMax
07/24/25 2:08am
ILSAC is the abbreviation for the International Lubricant Standardization and Approval Committee. It was jointly established by the American Automobile Manufacturers Association (AAMA) and the Japan Automobile Manufacturers Association (JAMA) to certify lubricant product specifications. The certification is issued by the American Petroleum Institute (API). Relevant information is as follows: 1. Introduction: ILSAC has developed the GF-1 test specification for internal combustion engine oils used in gasoline vehicle engines. The organization has currently established GF-1, GF-2, GF-3, GF-4, and GF-5 specifications for gasoline engine oils. 2. Principle: GF-* certification not only meets all the requirements of API S* but also passes the EC energy-saving requirements specified by ILSAC. Simply put, the GF specification is the API specification plus energy-saving requirements.
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DiLilah
08/10/25 9:48pm
As someone who frequently does DIY car maintenance, I think ILSAC is a pretty important motor oil standards organization. Its full name is the International Lubricant Standardization and Approval Committee, a certification system jointly established by American and Japanese automotive associations. That round starburst logo we see on oil cans with GF-5 or GF-6 written in the middle is their certification. This standard places special emphasis on fuel efficiency and environmental performance. For example, the GF-6 standard specifically addresses the low-speed pre-ignition issue common in small-displacement turbocharged engines. I always check for this logo when changing oil, because only by using certified oil can you keep the engine clean, reduce carbon buildup, and achieve noticeably lower fuel consumption.
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