You are over evaluating certain zones of italy then, it s not unusual to not find any distributor of 100Ron/98Ron, I have JUST ONE in a ray of 75km and it s also far from where I live and also if you find, sometimes it s really old or dirty fuel which causes more knocks than 95Ron... it s not a news Germany is better than Italy in many things
I m able to read yes, i m talking about you saying about different knock from mid to up range.. with stock tune i get no knock on high rpm , and very large knocks on mid range between 2200 to 4200 rpm, what'd I say to you? i flashed mu ecu over 148 times, and the stock maps counts for at least 25 of them, and logged every time
And about using 95Ron all the time.. what do you think are the long term side effects of it? other than a less clean engine? Because the knocks are obviously not damaging the engine, since this is exactly why IAM and base ignition map and base cam timing map exist.