该方法描述了从苯胺点、蒸馏、密度和粘度计算柴油十六烷指数（不含十六烷改进剂）的方法。根据规定公式计算的指数称为CGSB十六烷指数（CI）。附录A中还概述了根据含柴油点火改进剂（DII）的柴油计算出的十六烷指数估算十六烷指数（CIA）的建议程序。当使用CI和DII且未进行十六烷发动机试验时，此程序可用于估计燃烧质量。附录A不构成本方法的强制性部分。根据这种方法对产品进行测试和评估可能需要使用可能有害的材料和/或设备。 本文件并未涉及与其使用相关的所有安全方面。使用该方法的任何人都有责任在使用前咨询相关部门，并结合任何适用的监管要求制定适当的健康和安全规程。

This method describes a means for calculating the cetane index of diesel fuels (without cetane improvers) from the aniline point, distillation, density and viscosity. The index, as computed from the prescribed formula, is termed the CGSB Cetane Index (CI).A suggested procedure is also outlined in Appendix A to estimate the cetane index, additized (CIA), based on the calculated cetane index for diesel fuels containing diesel ignition improver (DII). This procedure can be used to estimate the combustion quality when CI and DII are used, and a cetane engine test is not performed. The Appendix A does not form a mandatory part of this method.The testing and evaluation of a product against this method may require the use of materials and/or equipment that could be hazardous. This document does not purport to address all the safety aspects associated with its use. Anyone using this method has the responsibility to consult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any applicable regulatory requirements prior to its use.