Well to be honest, my temp has never been very stable since day 1, i blame it on the engine bay area, not enough clearance for all the hot air to escape. Even with RON97 and above, occasionally on hard drive, i can still see temperature gauge creep past middle alittle bit. Once fan kicks in, it will return back to so called normal temp.If it runs colder on 97 or 100 then it could be knocking all these while.