ISO 5164:2014使用以恒定速度运行的标准单缸、四冲程循环、可变压缩比、化油器、CFR发动机，根据辛烷值的任意刻度建立了液体火花点火发动机燃料的额定值。研究辛烷值（RON）提供了在温和操作条件下汽车发动机中发动机燃料爆震特性的量度。 ISO 5164:2014适用于0 RON至120 RON的整个刻度范围，但工作范围为40 RON至120 RON。典型的发动机燃料测试范围为88 RON至101 RON。 ISO 5164:2014适用于含氧量高达4.0%（m/m）的含氧燃料和乙醇含量高达25%（V/V）的汽油。

ISO 5164:2014 establishes the rating of liquid spark-ignition engine fuel in terms of an arbitrary scale of octane numbers using a standard single-cylinder, four-stroke cycle, variable compression ratio, carburetted, CFR engine operated at constant speed. Research octane number (RON) provides a measure of the knock characteristics of motor fuels in automotive engines under mild conditions of operation. ISO 5164:2014 is applicable for the entire scale range from 0 RON to 120 RON, but the working range is 40 RON to 120 RON. Typical motor fuel testing is in the range of 88 RON to 101 RON. ISO 5164:2014 is applicable for oxygenate-containing fuels containing up to 4,0 % (m/m) oxygen and for gasoline containing up to 25 % (V/V) ethanol.