How to Deal with Insufficient Car Coolant?

[MacLawson]

If the coolant level is below the minimum line at normal temperature, you can add coolant. When adding, ensure the level does not exceed the maximum mark, as the coolant expands when hot due to thermal expansion. If the coolant level decreases over two years, there is no need to replace it; you can simply continue to top it up. The added coolant should have the same composition as the existing coolant. Here are some related points: 1. Note: Do not use water as a substitute unless absolutely necessary. In emergencies where coolant is unavailable, you can use soft water, such as purified water. Hard water can form scale at high temperatures, which, like in a household kettle, can clog the water jacket over time. 2. Coolant: Coolant consists of water, antifreeze, and additives. Based on the antifreeze component, it can be classified into types such as alcohol-based, glycerol-based, and ethylene glycol-based coolants.