Quote Originally Posted by Shaun P View Post
Just to clarify for those who care - straight off the net -100/130 avgas. The first number indicates the octane rating of the fuel tested to "aviation lean" standards, which is similar to the Motor Octane Number (MON) rating given to automotive gasoline. The second number indicates the octane rating of the fuel tested to the "aviation rich" standard, which tries to simulate a supercharged condition with a rich mixture, elevated temperatures, and a high manifold pressure.
Nice work
So we all know how Av compares to pump numbers now, eh . . . . . . . . . .