is there really any difference in the petrol, or is it just another way of getting us to spend that bit extra on fuel. at one time it was diesel to use being cheap, so what will do is get more people using it, so I know will put the price up. never trust fuel companies. there not in it for you (the driver).
But the 3200 is mapped for 95Ron or lower. Any gains of running 97 or 98 will be negligible or nothing.