Yet another approach may be the Motor Octane Selection (MON), that's also performed in a very lab by operating the check fuel within an motor at a greater temperature and rpm, though different ignition timing. The higher the octane score, the higher the fuel resists detonation and the more compression https://howtogeeks.co.uk/rev-up-your-engines-with-motorsport-supplies-your-ultimate-source-for-race-and-rally-parts-motorsport-components-and-race-fuel/