API maintains a number of lubricant-related publications. Most deal with API’s Engine Oil Licensing and Certification System (EOLCS). Some of these publications may be purchased through the API Publications, Programs, and Services Catalog. Others are available on request from EOLCS (eolcs@api.org).
API 1509, Engine Oil Licensing and Certification System, 16th Edition, April 2007
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 16th Edition of API 1509 is now available and can be downloaded in pdf format by clicking on the link below.
API 1509, 16th Edition (April 2007) - Now with Addendum I, March 2008
Base Oil Interchange (BOI) and Viscosity Grade Read-Across Guidelines are now available as downloadable pdf files. Click on the links below to download the most recent versions of both.
Appendix E--API Base Oil Interchangeability Guidelines for Passenger Car Motor Oils and Diesel Engine Oils (March 2007)
Appendix F--API Guidelines for SAE Viscosity-Grade Engine Testing (March 2007)
Publication 1520, Directory of Licensees: API Engine Oil Licensing and Certification System
Assists consumers in selecting quality engine oils by identifying the companies licensed to display the API Engine Oil Quality Marks. This Licensee Directory is updated as often as several times a week and can only be accessed on-line.
Publication 1560, Lubricant Service Designations for Automotive Manual Transmissions, Manual Transaxles, and Axles, 7th Edition, July 1995
Publication 1560 describes API gear lubricant service designations and assists manufacturers and users of automotive equipment in the selection of transmission and axle lubricants for a variety of operating conditions.
Engine Oil Guide
This three-page laminated guide is designed to help consumers understand the API Engine Oil Quality Marks—the API Certification Mark "Starburst" and Service Symbol "Donut"—and the API Service Categories. A downloadable Engine Oil Guide shelf card is available in PDF format. (When printing, set the properties to Landscape for best viewing.)
Guía de Lubricantes para Motores
Esta guía laminada ayuda a los consumidores entender el significado del Símbolo de Servicio y la Certificación de API. Pincha sobre file examinar una versión pdf. (Las características de la página se deben fijar al paisaje al imprimir.)
The Engine Oil guide is also available in Chinese. 机油指南 (Engine Oil Guide)
Shelf Cards are available in English, Spanish and Chinese and can be personalized with company logos. For information on personalizing the Shelf Cards, call (202) 682-8516. Individual copies of the cards are available free on request to API at eolcs@api.org or 1-202-682-8516. Multiple copies can be purchased by contacting API at the e-mail address or phone number above.
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