Skip to main content


Marketers of engine oil must obtain a license from API to use the API Engine Oil Quality Marks: the API Certification Mark "Starburst," the API Certification Mark "Shield" and the API Service Symbol "Donut." The use of the API Marks is a marketer's warranty that its licensed oils comply with the requirements set forth in API 1509 and API's Application for Licensure. The use of the marks also identifies the oil marketer as the marketing organization responsible for the integrity of a brand name and the representation of the branded product in the marketplace.

The license application requires the applicant to certify that its oils meet Engine Oil Licensing and Certification System (EOLCS) requirements. To become licensed, applicants must complete the following steps:

  1. 登录
  2. 确认电子邮件地址
  3. Enter company information
  4. Complete product information for the engine oil or oils to be licensed (brand names, viscosity grades, API service categories, and traceability codes for packaged products). Note that API will not allow licensed company names or brand names that contain any reference to API, API Service Categories, SAE viscosities, or any terms that infer API endorsement (for example, the terms “certified,” “approved,” “licensed,” “accredited,” “endorsed,” “qualified,” “verified,” etc.
  5. Sign the API License Agreement
  6. 生成应用程序发票
  7. 支付申请费并输入必要的付款信息





For help with an EOLCS application or an account, you can download the EOLCSUser Guide.

API Starburst.
API Donut

新的EOLCS fee structure有效的2017年12月1日,如下所示and can be downloaded. Licensing fees are reviewed annually and are subject to change.

费用类型 Fee (USD)
许可证申请费 4,500美元
许可续签费 4,500美元
Additional renewal fee based on volume $ 0.007.

At time of annual license renewal, licensee must report volume of API-licensed engine oil sold. API assesses $0.0070 per gallon fee on each gallon reported in excess of 1 million gallons. All API-licensed engine oil brands, whether sold in packages or in bulk, must be counted in the volume reported.



API Starburst.