How did u tuned the car?

Most EFI engine does not need retuned right?

I'm running DOHC 1.6
Using RON95 my car got knocking issue, adjusted the distributor can reduce just a little bit, engine slightly less power as my engine is high compression and need higher RON bcos it is harder to combust

But so far is still ok la, since it is cheap, I pumped 97, tak boleh tahan wei~~~

I would love to do this. But it would be quite redundant and expensive.

Most modern cars these days need time for the ECU to adjust to the octane differences. Pump in RON95 and give it a day or 2 to adapt. Go dyno.

Then when almost empty fill with RON97 and drive around until it's almost empty then fill up with RON97 again. Go dyno.

That way the ECU will have plenty of time to adapt and it'll be close to fair depending on the conditions you go for the dyno.

These days people think the ECU adapts instantaneously... it doesn't unless you reset it and force it to relearn there and then or program it (if possible) to utilize the octane differences.