Выдержка из официального руководства по эксплуатации Accord:
Gasoline
Your Honda is designed to operate on unleaded gasoline with a pump octane number of 86 or higher. Use of a lower octane gasoline can cause a persistent, heavy metallic rapping noise in the engine that can lead to mechanical damage.
Таблица примерного соответствия октановых чисел:
Below is an approximate comparison chart, these numbers can vary by as much as 2 grades
RON MON PON
90 83 86.6
92 85 88.5
95 87 91
96 88 92
98 90 94
100 91.5 95.8
105 95 100
110 99 104.5