What water does the gas station add to the car wash for free?

Free car washing and water addition at gas stations can be divided into the following two situations:

1, coolant: the full name of antifreeze coolant, which means it can cool down and prevent freezing. Antifreeze coolant is a special liquid with special additives, which is mainly used in the cooling system of liquid-cooled engines. Antifreeze has excellent properties such as anti-freezing in winter, anti-boiling in summer, anti-pollution and anti-corrosion all year round, and plays a vital role in protecting automobile engines.

2. Glass water: the official name of automobile windshield cleaning liquid, commonly known as glass water, is used to clean the front windshield and maintain the best transparency. High quality windshield water is mainly composed of water, alcohol, ethylene glycol, corrosion inhibitor and various surfactants. When the windshield is dirty and fuzzy, spraying glass water can give the driver a clear driving vision.