Yup our RON is different:- https://autoexpert.com.au/posts/the-ultimate-guide-to-octane-ratings-the-truthThe octane rating in the US must be different from Australia. We don't have 95 or 98 at normal petrol stations.
"Essentially, for any given fuel, RON is about four points higher than the Anti-Knock Index. So 91 here - our entry-level cat’s piss petrol - is about the same as 87 gasoline in the USA and Canada."