This publication describes the API Engine Oil Licensing and Certification System (EOLCS) and is intended to explain to marketers how different registered marks are licensed and displayed for the consumer. The publication describes methods for developing new engine oil performance requirements and provides the marketer with a description of registered marks and their use@ licensing requirements@ aftermarket conformance@ and enforcement procedures. It also explains the interaction and roles of the various independent organizations that are part of the API EOLCS.
API PUBL 1509-1993 history
1996API PUBL 1509-1996 Engine Oil Licensing and Certification System (Fourteenth Edition; Addendum 1 December 1998; Technical Bulletin 4 July 6@ 1999)
1995API PUBL 1509-1995 Engine Oil Licensing and Certification System Thirteenth Edition
1993API PUBL 1509-1993 Engine Oil Licensing and Certification System (TWELFTH EDITION)
1988API PUBL 1509-1988 ENGINE SERVICE CLASSIFICATION SYSTEM AND GUIDE TO CRANKCASE OIL SELECTION (ELEVENTH EDITION)
1985API PUBL 1509-1985 Engine Service Classification System and Guide to Crankcase Oil Selection (Tenth Edition; ADDENDUM: July 1986)
1983API PUBL 1509-1983 Engine Service Classification System and Guide to Crankcase Oil Selection (Ninth Edition)
1980API PUBL 1509-1980 Engine Service Classification System and Guide to Crankcase Oil Selection (Eighth Edition)
1979API PUBL 1509-1979 Engine Service Classifications and Guide to Crankcase Oil Selection (SEVENTH EDITION)
1972API PUBL 1509-1972 Engine Service Classifications and Guide to Crankcase Oil Selection (Sixth Edition)
1969API PUBL 1509-1969 CLASSIFICATION OF INTERNAL COMBUSTION ENGINE SERVICE to Guide the Choice of Crankcase Oils (Fourth Edition)
1965API PUBL 1509-1965 CLASSIFICATION OF INTERNAL COMBUSTION ENGINE SERVICE to Guide the Choice of Crankcase Oils (Third Edition)
1956API PUBL 1509-1956 INTERNAL COMBUSTION ENGINE SERVICE GUIDE THE CHOICE OF CRANKCASE OILS