As I mentioned we make our petrol in Australia to Australian Standards. I think we are always a few steps behind Europe as the quality car manufacturers in Europe put a lot of pressure on the oil companies to supply better fuel. The fuel quality in Europe is mainly governed by pollution prevention requirements.
The vehicle manufacturers have to comply with the laws and redesign their engines accordingly. To meet the requirements the fuel will have to match.
The only reason our fuel is improving is because the companies like VW put pressure on the oil companies and the government in Australia.
Basically any oil company produces fuel to the lowest specification allowable as it cost more to make it better.
RON is only one of the specs but if the spec says 91 RON, that is what you make, not 91.1. This cost more and you will not last long as a Production Planner if you consistently go over the minimum spec.
I hope this helps,
Arie
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