I’m travelling in the US and I note that the max RON available at petrol stations is 91 RON. Given that most of the new European cars want 98 RON, what do they in the US?
We’ve driven many times in the US and even purchased 110-octane performance fuel at a Sunoco station. The reason for the difference on the pump is most likely that they are advertising the fuel’s octane rating. In the US, however, the octane is measured by the Motor Octane Number— while Australia goes with the Research Octane Number.