Do I Need to Add Water When Refilling Windshield Washer Fluid?
2 Answers
For non-concentrated windshield washer fluid, there is no need to dilute it with water as the ratio has been pre-mixed during production. However, concentrated windshield washer fluid requires dilution with water according to the instructions. The characteristics of non-concentrated and concentrated windshield washer fluids are as follows: 1. Non-concentrated windshield washer fluid: Firstly, windshield washer fluid not only cleans the windshield but also has multiple functions such as anti-static, anti-fog, lubrication, and antifreeze properties. During summer, when everything is thriving, you can choose a windshield washer fluid containing insecticide resin to effectively remove insect residue. In winter or extremely cold regions, it's essential to use antifreeze windshield washer fluid specifically designed for winter use. 2. Concentrated windshield washer fluid: It can quickly remove dirt from the windshield and forms a protective film, improving driving visibility to some extent. It gently protects the wiper blades, extending the lifespan of the wipers. After dilution, it can also be used to clean other items, such as car seats and the surface of the center console, offering more versatility than regular windshield washer fluid.
When I first started learning to drive, I also wondered about this issue. It actually depends on the type of windshield washer fluid. Most bottled windshield washer fluids are pre-mixed, so you can just pour them directly into the car's reservoir—no need to add extra water. Those labeled as 'ready-to-use' are specifically designed this way, offering strong cleaning power and reducing the risk of clogging the nozzles. I've tried different brands myself and found that adding water only dilutes the effectiveness, making it less efficient in cleaning during rain. However, there is one exception: if you buy a concentrated solution, the bottle label will instruct you to dilute it with water in the correct proportion. Otherwise, it can be too strong, wasting the product and potentially scratching the glass. In short, get into the habit of reading the product instructions and don’t try to save money by adding water on your own. In winter, I highly recommend using antifreeze windshield washer fluid to ensure it works in sub-zero temperatures. Don’t use tap water as a substitute, or the nozzles may freeze and get stuck, causing more trouble. New drivers should ask experienced friends for advice—safety comes first.
