1.1本规范涵盖了一种燃料混合物，标称为75%至85%体积的变性燃料乙醇和25%至15%体积的额外碳氢化合物，用于配备汽车火花点火发动机的地面车辆。附录X1讨论了规定特性的重要性。 1.2以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3以下预防性警告仅适用于本规范附录A1的试验方法部分。本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

1.1 This specification covers a fuel blend, nominally 75 to 85 volume % denatured fuel ethanol and 25 to 15 additional volume % hydrocarbons for use in ground vehicles with automotive spark-ignition engines. Appendix X1 discusses the significance of the properties specified. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 The following precautionary caveat pertains only to the test method portion, Annex A1 of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.