Will using summer windshield fluid in winter damage the car?

[LeahAnn]

Yes. Summer windshield fluid is prone to freezing, which can cause the washer fluid reservoir to malfunction. When selecting windshield fluid, it should be chosen according to the season: In winter, the antifreeze performance should be the selection criterion. Choose a windshield fluid with a freezing point at least 10°C below the local minimum temperature. Otherwise, when the temperature drops in winter, the windshield fluid will freeze and become unusable, leading to issues such as malfunctioning of the washer fluid pump. Use antifreeze windshield washer fluid in winter: It ensures that the car's facilities will not freeze even when the outside temperature is below -20°C; there is also a special antifreeze type that remains unfrozen at -40°C, suitable for use in the extremely cold regions of northern China.