Marketers of engine oil must obtain a license from API to use the API Engine Oil Quality Marks: the API Service Symbol "Donut" and Certification Mark "Starburst." 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 license application requires the applicant to certify that its oils meet Engine Oil Licensing and Certification System (EOLCS) requirements.
IMPORTANT NOTE: API has placed a hold on all new applications and requests for changes to existing licenses until a new online application system is launched later this month. This pause will allow API time to migrate the current license data into the new system. We appreciate your patience as we work to launch the new system. Those who wish to apply for a new license or modify an existing license should be able to do so in the new system. Please direct any questions or comments regarding licensing to EOLCS@api.org.