Bro high octane may not eradicate engine knocking, issue may be somewhere else.
I would suggest Total Quartz 9000 Future series; either in 0w-20, or at max, 5w-30 engine oil grade. You can also look for fully synthetic engine oil in Shell, Kixx, ZIC, Mobil1, Caltex, Chevron, Havoline, etc. but just ensure that engine oil is 100% genuine and original and meets latest API SN / SN plus, and / or ILSAC GF-5 criteria.
Always choose between, 0w-20, 5w-20 and at max, 5w-30 grade for max. engine output.