yes the detonation is very very dangerous and harmfuul for the engines sepcially if you are having heavy load on the car
and also if the engine temprature incresed so what i can advice you is :

if you have any heavy load in the car try not to accelrate fast and take it easy with the engine and if possible switch off the AC

try to put octan booster or 95 octan fuel at least twice a month like this the ECU can reset and back to normal map again other wise you need to remap the ECU to match with 92 octan and this is very expensive

try to keep the engine cool as much as you can specially in the summer by changing the oil before the milage limit for it( if 5000 oil chang it at 3500 or 4000 max)and use the recommended oil in the user manual of the car
Also keep watching the water level

use high performance spark plugs for better burning using while the low octan fuel

Thanks
Eng. Sherif Shaker