They may also be tested for cold cranking, pumpability, volatility, gelation, foaming, filterability, flash point, and shear stability. All samples undergo elemental analysis, viscosity at 100☌, and high-temperature/high-shear testing. Conforming oils show test results that are consistent with the formulations on-file and meet program requirements. The results are compared to licensee formulations on file at API. Under AMAP, API-licensed engine oils are purchased in the marketplace and tested to determine their physical, chemical, and performance properties. Army, the Independent Lubricant Manufacturers Association (ILMA), the former American Automobile Manufacturers Association (AAMA), and API. AMAP replaced the Oil Labeling Assessment Program (OLAP), a testing program jointly funded by the U.S. A complete list of licensees is available on our licensee directory.ĪPI has been testing packaged and bulk engine oils under its Aftermarket Audit Program (AMAP) since 1994. This includes running physical, chemical, and performance tests on licensed engine oils and verifying that the API-registered Marks are properly displayed on containers and convey accurate information to consumers.Ībout half of the program’s licensees are based in the United States, and the other half are spread around the globe. The Engine Oil Program is backed by a monitoring and enforcement program that ensures licensees adhere to program requirements. The performance requirements and test methods are established by vehicle and engine manufacturers and technical societies and trade associations such as (ASTM), (SAE), and the American Chemistry Council (ACC). Launched in 1993, API’s Engine Oil Program is a cooperative effort between the oil and additive industries and vehicle and engine manufacturers Ford, General Motors, and Fiat Chrysler and those represented by the Japan Automobile Manufacturers Association and the Truck and Engine Manufacturers Association. API’s Engine Oil Licensing and Certification System (EOLCS) is a voluntary licensing and certification program that authorizes engine oil marketers that meet specified requirements to use the API Engine Oil Quality Marks.

Engine oil viscosity test