API 1509 Engine Oil Licensing and Certification System
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API 1509 Document Information:
Title
Engine Oil Licensing and Certification System
American Petroleum Institute
Publication Date:
Apr 1, 2002
Scope:
This publication describes the API Engine Oil Licensing
and Certification System (EOLCS), a voluntary licensing and
certification program designed to define, certify, and monitor
engine oil performance deemed necessary for satisfactory
equipment life and performance by vehicle and engine manu-
facturers. Engine oil marketers that meet EOLCS require-
ments may be licensed to display two Marks, the API Service
Symbol and the API Certification Mark.
Sections 2 through 6 of this publication define the current
API engine oil service categories and explain the EOLCS
licensing requirements, the API Marks and their use, and the
EOLCS Aftermarket Audit Program. Appendices A through
Q provide a brief history of engine oil classifications,
describe methods for developing new engine oil performance
requirements, and explain the interaction and roles of the vari-
ous independent organizations that are part of the API EOLCS.
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