At What Subzero Temperature Should Car Water Be Replaced with Winter Windshield Washer Fluid?

[SanMargaret]

Replace car water with winter windshield washer fluid at -10 degrees Celsius. Windshield Washer Fluid: The selection of windshield washer fluid should be based on its antifreeze performance. Choose a fluid with a freezing point at least 10 degrees Celsius below the local minimum temperature. Functions of Windshield Washer Fluid: Windshield cleaner is formulated with various surfactants and additives. Surfactants typically have functions such as wetting, penetrating, and solubilizing, thereby achieving cleaning and stain removal. The presence of alcohol and ethylene glycol significantly lowers the freezing point of the liquid, providing antifreeze properties and quickly dissolving frost. A monomolecular protective layer forms on the glass surface. This protective film prevents the formation of fog droplets, ensuring clear and transparent windshields and unobstructed visibility.