I was overseas for the past 2 weeks, and upon returning, I realied that my Getz is more powerful.
Later I realised that my bro-in-law, who had been using my car during my absence had pumped 98RON petrol. I always pump 95RON.
So 98RON does make a car more powerful.
The engine is now quieter and smoother.
I thought so long as the min RON is used, it's fine, but now I realised that higher RON makes a car more powerful, and quieter and refined!