Playing romulation games on original PSOne

16x is way too high, no more than 4x

I set the burning speed to 6x but IMGBURN forced it to 16x

Okay, im back... As said above, I have ImgBurn and i tried to burn on 6x (before reading LoonyLion's advice).
But the weirdness starts here. Imgburn says that it CAN'T write on 6x and it sets speed at 16x.
What the f***?!