what is US unit of measurement for Octane ratings?
Evolving Member
Joined: May 2005
Posts: 354
Likes: 0
From: NorCal
In most countries (including all of Europe and Australia) the "headline" octane that would be shown on the pump is the RON, but in the United States and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2.
Originally Posted by Sackett
On the pumps here, we see (R+M)/2
91 AKI is aprox 95 RON
93 AKI is aprox 97 RON
94 AKI is aprox 98 RON
Later,
Keith
