WHAT IS API?

The American Petroleum Institute (API)

API's Engine Oil Licensing and Certification System (EOLCS) is a voluntary licensing and certification program that authorizes engine oil marketers who meet specified requirements to use the API Engine Oil Quality Marks

The API Service Symbol "DONUT" and Certification Mark "STARBURST".
Please Visit : http://www.api.org/products-and-services/engine-oil

Good for your engine and
the environment