Can I add mineral water if the windshield washer fluid runs out?
4 Answers
You cannot add mineral water when the car's windshield washer fluid runs out. Below are the specific functions of windshield washer fluid: 1. Cleaning performance: Windshield washer fluid is formulated with various surfactants and additives. Surfactants typically have functions such as wetting, penetrating, and solubilizing, thereby achieving the effect of cleaning and removing dirt. 2. Antifreeze performance: It can significantly lower the freezing point of the liquid, thus providing antifreeze effects and quickly dissolving frost. 3. Anti-fog performance: A single-molecule protective layer forms on the glass surface. This protective film prevents the formation of fog droplets, ensuring the windshield remains clear and transparent with a clear field of vision. 4. Anti-static performance: After cleaning with windshield washer fluid, substances adsorbed on the glass surface can eliminate surface charges, providing anti-static properties. 5. Lubrication performance: It has a higher viscosity, which can provide lubrication, reducing friction between the wiper blades and the glass, and preventing scratches.
You can temporarily add some mineral water in an emergency. I've tried it a few times myself. I remember once when I was on a long-distance trip and ran out of windshield washer fluid, with no stores nearby, I just poured in some mineral water. It barely managed to clean the windshield. However, this is only a stopgap measure—mineral water doesn’t contain detergent, so stains won’t come off, and over time, mineral deposits can clog the nozzles, potentially costing hundreds to fix. It might be slightly better in summer, but never use it in winter—mineral water can freeze easily, making it extremely dangerous when you can’t see the road clearly while driving. Now, I always keep a bottle of windshield washer fluid in my car. It’s not expensive to buy at gas stations or auto parts stores—just about a dollar per liter—and it’s much more hassle-free than improvising. Plus, it helps protect your car’s components. Always check the fluid level regularly—don’t slack off.
Adding mineral water can save a bit of money, and I understand why some people do it for convenience. In the short term, it's not really a problem—for example, if you're on the highway and run out of windshield washer fluid, pouring in mineral water can work for a wash or two, and the cleaning effect is decent. But in the long run, mineral water lacks antifreeze and anti-contamination properties, increasing the risk of freezing in winter and potentially clogging the nozzles, which could backfire. In summer, it may not clean effectively, leading to blurred vision and safety hazards. I highly recommend buying dedicated windshield washer fluid—it's affordable, widely available online or in supermarkets for just a few bucks, performs better, and extends nozzle lifespan. Make it a habit to check and refill regularly to avoid last-minute hassles, saving both money and time while ensuring safety.
I suggest not using mineral water for a long time. The windshield washer fluid has a special formula that can remove dirt, prevent freezing, and lubricate the nozzles, which mineral water lacks. It's okay for temporary emergencies, like running out of fluid on the road and adding some for a quick wash. However, long-term use can lead to nozzle clogging and corrosion, which is especially dangerous in winter as it may freeze and crack. Bacterial growth can also affect health. It's safest to always keep windshield washer fluid in your car. Reputable brands like Blue Star are not expensive, and safety should always come first when driving.
