American Petroleum Institute (API)

The API Engine Oil Licensing and Certification System (EOLCS), is a voluntary licensing and certification program designed to define, certify, and monitor engine lubricant performance deemed necessary for satisfactory equipment life and performance by vehicle and engine manufacturers. Performance requirements, test methods, and limits are cooperatively established by vehicle and/or engine manufacturers [namely, Ford, General Motors, and DaimlerChrysler; Japan Automobile Manufacturers Association (JAMA); and Engine Manufacturers Association (EMA)] and technical societies such as American Society for Testing and Materials (ASTM), Society for Automotive Engineers (SAE), and American Chemistry Council (ACC).

Engine lubricant marketers that meet EOLCS requirements may be licensed to display two Marks, the API Service Symbol and the API Certification Mark.

The program’s Marks are intended to help the consumer identify products that have satisfied the requirements for licensing and certification. API issues a license to an lubricant marketer after the marketer confirms it has met all the requirements spelled out within the EOLCS Application Package. The marketer must execute the API Licensing Agreement as a condition of licensure. The system includes an audit process to verify that licensed products in the marketplace comply with the terms of the API Licensing Agreement.

API’s licensing of an engine lubricant does not imply that engine lubricants with the API Marks are appropriate for all vehicles or engines in the field. The consumer or installer must refer to the owner’s or operator’s manual for specific vehicle or engine manufacturer’s engine lubricant recommendations.

API Licenses Directory: http://eolcs.api.org/<