Dear All, need some advise. my car is 523 year 2007. Start form last week, my car got sign "Coolant level too low" then i check the tank yes coolant is low. Then i go and buy a coolant oil at Petronas i top up with water until full. after 3 days my car got same sign "Coolant level to low". please advise is it normal what? and also what is the price if need to repair. thanks..