1.Previous
3.Next

pump gasoline will be about 8 to 12 lower than the RON, but there is no direct link between RON and MON. See the table below.

Anti-Knock Index (AKI) or (R+M)/2

In Canada, The United States, and Mexico, the advertised octane rating is the average of the RON and the MON, called the Anti-Knock Index (AKI). It is often written on pumps as (R+M)/2. AKI is also sometimes called PON (Pump Octane Number).

Difference between RON, MON, and AKI

Because of the 8 to 12 octane number difference

1.Previous
3.Next