What kind of water is added to a car radiator?

[NatalieRose]

The "water" added to a car radiator is actually coolant. Here are some relevant details about coolant: 1. If the coolant level in the reservoir drops below the minimum mark (normal capacity should be between MIN and MAX), it should be replenished promptly. The replacement cycle is typically every two years or every 30,000-40,000 kilometers driven. Vehicles with high usage frequency should consider replacing it earlier as needed. 2. Coolant helps lower temperature, regulates heat, and resists deterioration and chemical reactions. In emergency situations, distilled water can be temporarily used as a substitute, but tap water should never be added. 3. Coolant also provides anti-freeze, anti-corrosion, anti-scale, and anti-boiling functions. High-quality coolant has a bright color, is clear and transparent, and odorless. When heated in a beaker and measured with a thermometer, genuine coolant should have a boiling point above 100°C. Products with a boiling point below 100°C are counterfeit or inferior.