Coba jelasin Contoh penarafan oktana dari Penarafan oktana dalam bahasa melayu dong

RON dan MON bagi n-heptana dan iso-oktana mengikut definisi adalah secara tepatnya 0 dan 100.  Jadual berikut menyenaraikan penarafan oktana bagi pelbagai bahan api lain.

*Hydrogen does not fit well into the normal definitions of octane number. It has a very high RON and a low MON, so that it has low knock resistance in practice, due to its low ignition energy (primarily due to its low dissociation energy) and extremely high flame speed.  These traits are highly desirable in rocket engines, but undesirable in Otto-cycle engines.  However, as a minor blending component (e.g. in a bi-fuel vehicle), hydrogen raises overall knock resistance.  Flame speed is limited by the rest of the component species; hydrogen may reduce knock because of its high thermal conductivity.