For Wira better get a Water Temp with warning... it safe me 2 times....
1. Noon time with very hot weather. Further more traffic jam...usually my Water Temp is below 90'c and above 86'c out of sudden the temp go up more then 90'c warning beep (90'C Warning Set). When drive fast then temp goes down. First was tot is the Radiator Fan spoil or Radiator no water. After check found out is the fuse had burn, cause the fan not running at full speed which make the temp goes up.
2. Driving at normal night time, when traffic light temp suddenly goes up. So when to check, end up found out the radiator water lesser. So refill it then no issue happen.....hoho.....
Some advise, change car collent after 3 or 4 times oil changed or even 2 times, cause coolent won't cost you much. So just get it changed when ever u feel like
Further more i'm using 3 layers aluminium radiator, seldom won't have temp go up....

so when ever temp goes up, confirm sure something's not right... so better get it check.....
- Radiator Water Level
- Spare Tank Water Level
- Air con Fan, Radiator Fan
- Thermostat
- Water Pump