Can tap water be used for car windshield washer fluid?
2 Answers
Tap water cannot be used for car windshield washer fluid as it contains a large amount of impurities and minerals, which can easily cause nozzle clogging and scaling. Windshield washer fluid is specifically designed for cars, with characteristics that prevent rusting of car parts and freezing in winter. Therefore, do not use tap water or ordinary water. Method for adding windshield washer fluid: 1. Open the car's front hood and locate the blue cap behind the left headlight; 2. Find the white tube connected to a white jug-shaped object with a fan-shaped graphic on the cap, indicating the windshield washer; 3. Open the cap and add the fluid directly. There is a windshield washer fluid level indicator on the car's dashboard, which will start flashing when the fluid is running low, reminding the driver to refill it.
I used to work at an auto repair shop for a while and saw many people using tap water as windshield washer fluid to save a little money, which is actually quite risky. Although tap water is readily available and free, it contains high mineral content that can cause scale buildup over time, clogging the nozzles and pump. This results in poor cleaning performance, leaving behind water stains instead of removing oil films. It gets worse in winter—I've seen several cases where frozen water expanded and damaged the tubing. Personally, I recommend using distilled water with a bit of white vinegar or alcohol to make your own antifreeze solution, which costs just a few dollars per bottle—much cheaper. If you really want to save money, stock up on professional windshield washer fluid when it's on sale—it's durable and safe. Cutting corners on car maintenance details isn't worth it; the money you save now could lead to costly repairs later and even compromise driving visibility, making it dangerous when you can't see the road clearly in critical moments. I never use random water in my own car to ensure the system functions properly and lasts longer.
