Can I Add Mineral Water to Windshield Washer Fluid?
2 Answers
Mineral water should not be added to windshield washer fluid. Mineral water itself lacks lubricating properties, and prolonged use can cause severe scratching of the car's windshield. Additionally, it increases the friction on the wiper blades, leading to skipping and unusual noises during operation. Mineral water contains various impurities that can form sediment, which may accumulate and clog the pipes, ultimately reducing the lifespan of the reservoir tank. Windshield washer fluid, commonly known as glass cleaner, is primarily composed of water, alcohol, ethylene glycol, corrosion inhibitors, and various surfactants in high-quality formulations. It typically features wetting, penetrating, and solubilizing functions to effectively clean and remove dirt.
I've been driving for over a decade and have encountered many novice friends asking whether mineral water can be used as windshield washer fluid. Honestly, I really don't recommend it. Mineral water contains high levels of minerals, especially calcium and magnesium, which can form scale in the spray nozzles over time and clog them, leading to poor spray performance and reduced cleaning effectiveness. Windshield washer fluid contains specialized cleaning agents and antifreeze, which can remove oil stains and bug residue from the glass, and it also prevents the system from freezing in winter. I've personally seen cases where using mineral water ruined the nozzles, resulting in costly repairs. In an emergency, distilled water can be used temporarily, but mineral water is too hard and can leave water spots while also damaging the wiper blades. Developing a habit of checking the windshield washer fluid reservoir is crucial—safety should always come first, and it's not worth risking major issues for minor conveniences.
