Your car coolant is crucial to your car's cooling system. The coolant contains glycol and water and is what prevents the engine from overheating. If your coolant level is consistently low, you may want to have a Toyota Service Technician check for a leak.
In Australia, where the climate can vary dramatically, the anti-boiling and anti-freezing properties of 50/50 Premixed Super Long Life Car Coolant are invaluable.
For optimum performance and cooling efficiency, have the car coolant replaced at intervals in accordance with your Service & Warranty logbook or every 80,000kms.