Use higher RON or lower RON. This topic has been discussed many times and in lots of forums as well. I think there is no hard rule on this as it differs from car to car. Previously i am driving getz 1.3A. This car damm bo lat. When i switched from RON92 to RON95, the improvement on acceleration is obvious. I was on Esso Mobil then.
Then when i switch to Caltex Silver (RON95), there is a slight further improvement on my acceleration also. Smoother. Maybe is Techron.

Since then I have been on Caltex until now.
So, IMO, 92 octane is enuff, coz the spec says so. You can try higher octane fuel, it may improve your driving experience
