The problem is that there was a time (probably about 10yrs ago now) when cars said to run on Super in the filler cap, but they could safely be run on 95RON. At that time, you'd get good performance from 95RON (that stated performance in the manual), and with Super you'd get a bit more. People still assume this is ok but as we've seen with the Zed, even the @*!# fuel map does not wind back enough timing to stop doing damage above 5kRPM. Its only now that people are really coming around to the idea that its not only losing you power, but also very damaging to the engine
The problem a lot of new Zed owners now have is that the previous owners have run on 95RON and already done the damage