i went to kota kinabalu last week from brunei with my biker friends to do some uphill and downhill challenge. We did a couple of refuelling and i did notice knocking with petronas 95 and my water temp is hotter. Normally cruising at 120kmh is 78 and after fill up is constantly showing 88. Knocking is apparent at high rev 8k rpm and above so i kept it low. So after a few hundred km we all topped up back with shell 95 and we were all rev happy. After topping up with shell 97, even better.. Like normal. Im not trying to say petronas 95 fuel sucks, it does its job but personally, it wont be going into any of my engines anymore.
Just my thoughts.