What is the difference between adding windshield washer fluid and tap water to a car?

[HarrisonDella]

Compared to tap water, windshield washer fluid has a lower freezing point. It won't freeze even when the outside temperature drops below -20°C, whereas tap water will freeze below 0°C. Therefore, tap water should not be used in winter; only antifreeze windshield washer fluid is suitable. Here are some relevant details: 1. Windshield washer fluid: Commonly known as car windshield cleaning fluid, it is a consumable automotive product. High-quality windshield washer fluid mainly consists of water, alcohol, ethylene glycol, corrosion inhibitors, and various surfactants. 2. Disadvantages: Tap water contains a large amount of mineral ions such as calcium, magnesium, and sodium. Since the windshield washer fluid pipes are usually quite narrow, prolonged use of tap water can lead to mineral deposits in the pipes and nozzles. These deposits can not only clog the pipes and nozzles but may also cause metal parts to rust or foster bacterial growth.