Octane Rating

[ClassicVW_imp]

Hm, I wonder why you have this low quality fuel in the US?

Here in Europe, cheapest fuel starts at 95 Octan. There are 2 sorts, one containing 5% or less Ethanol, one containing 10% Ethanol, called E10.

Then there is at least one sort of 98 Octan, some brands offer even more than 100 Octan.

The CB has relatively low compression, 9.something. So it needs not that quality of fuel. However, my BMW K1100 had compression 14 to 1, still ok with 95 Octan, but should not have less.

Most sportcars like Porsche here need 98 octan, to allow full power. They can handle less qualitity, will have less power then.

It's a different standard used in Europe than in Canada and the U.S.
The U.S. octane number will be 4 to 6 numbers less than your number for the exact same fuel.

Europe just uses the RON which is the Research Octane Number, while the U.S. And Canada uses a number which is the sum of the RON and MON ( Motor Octane Number ) divided by two. The RON will always be between 8 and 12 numbers higher than the MON.