Can I Add Tap Water to the Windshield Washer Reservoir?

[OliveLee]

It is not recommended to add tap water to the windshield washer reservoir. Here are the reasons: 1. Most tap water has hard water quality or contains impurities, which results in poor cleaning performance. This can reduce glass transparency, form deposits over long-term use, potentially clog pipes and damage wiper blades. Additionally, tap water can freeze in cold winter weather, failing to protect the car windshield. 2. Automotive windshield washer fluid is specifically designed for cleaning car windows. Its main components include water, ethylene glycol, alcohol, corrosion inhibitors, and various surfactants. It is considered a consumable item in vehicle maintenance. 3. Additional information: Windshield washer fluids come in summer and winter formulations. Summer fluids contain insect remover additives to clean insect residues on windshields, while winter fluids mainly contain antifreeze agents to ensure usability in low-temperature environments.