API 1509 Documents
API 1509 describes the voluntary API Engine Oil Licensing and Certification System (EOLCS) and explains to marketers how different API marks are licensed and displayed for the consumer. The current edition of API 1509 is now available and can be downloaded in pdf format.
Downloads
API 1509, Engine Oil Licensing and Certification System, 18th Edition, June 2019
File Size: 1.6 MB
Current complete edition
Portuguese Translation: API 1509, Engine Oil Licensing and Certification System, 18th Edition, June 2019File Size: 3.0 MB
Current complete edition
File Size: .6 MB
New items are shown in red and deleted items in strikeout
API 1509 Annex F-API Guidelines for SAE Viscosity-Grade Engine Testing (Revised September 2019)
File Size: .6 MB
New items are shown in red and deleted items in strikeout