本SAE标准概述了通过汽车制造商联盟（Alliance of Automobile Manufacturers，简称Alliance）、美国石油学会（American Petroleum Institute，简称API）、美国试验与材料学会（American Society for Testing and Materials，简称ASTM）、发动机制造商协会（engine Manufacturers Association，简称EMA）、国际润滑油规范咨询委员会（International Lubric Specification Advisory Committee，简称ILSAC。API和ASTM的口头描述以及规定的试验方法和限值见表1中的活性类别和表A1中的过时类别。因此，附录a是过时类别的历史文件。 在本文件中，有效类别定义为（a）所需试验设备和试验支持材料（包括参考发动机油和参考燃料）随时可用，或类别寿命监督小组已确定不可用试验和较新可用试验之间的等效性；（b） 哪个ASTM或测试开发者监控所有测试的精度；和（c）在编写本文时，API EOLCS可对其进行许可。目前启动新分类的流程是通过联盟、API、ASTM、EMA、ILSAC和SAE的合作开发的。 使用API 1509附录C中定义的程序开发新的ILSAC分类。使用API 1509附录D中定义的程序添加新的API？C？类别。API润滑油组添加新的API？S？类别。

This SAE Standard outlines the engine oil performance categories and classifications developed through the efforts of the Alliance of Automobile Manufacturers (Alliance), American Petroleum Institute (API), the American Society for Testing and Materials (ASTM), the Engine Manufacturers Association (EMA), the International Lubricant Specification Advisory Committee (ILSAC), and SAE. The verbal descriptions by API and ASTM, along with prescribed test methods and limits, are shown for active categories in Table 1 and obsolete categories inTable A1.Appendix Ais thus a historical documentation of the obsolete categories.For purposes of this document, active categories are defined as those (a) for which the required test equipment and test support materials, including reference engine oils and reference fuels, are readily available, or for which the Category Life Oversight Group has established equivalencies between unavailable tests and newer, available tests; (b) which ASTM or the test developer monitors precision for all tests; and (c) which are available for licensing by API EOLCS at time of writing.The current processes for initiating new classifications were developed through the cooperative efforts of the Alliance, API, ASTM, EMA, ILSAC, and SAE. New ILSAC classifications are developed using the procedure defined in API 1509 Annex C. New API ¿¿¿C¿¿¿ categories are added using the procedure defined in API 1509 Annex D. New API ¿¿¿S¿¿¿ categories are added by the API Lubricants Group.