How to Replace Summer Windshield Washer Fluid with Winter One?
2 Answers
Windshield washer fluid replacement method in winter: 1. If it's the same brand of washer fluid, there's no need to drain the summer fluid - you can directly add winter fluid as they can be mixed. If using different brands, first completely drain the summer fluid before pouring in winter fluid. Different brands contain different ingredients that may react chemically, forming sediments that could clog the nozzles and eventually prevent spraying completely. 2. To add winter fluid, open the engine hood, locate the filler cap with washer symbol, open it and pour in the fluid until reaching the marked level (there's a dipstick inside the reservoir). 3. Don't forget rear wipers if equipped. The long tubing between rear wiper and reservoir may retain summer fluid which could freeze if not properly drained during replacement.
I have to deal with this every year. As soon as autumn and winter arrive, it's time to change the windshield washer fluid. The summer version mainly focuses on bug removal and cleaning, but when it gets cold, it can easily freeze. If it freezes and can't be sprayed, it's a real hassle. My approach is to pick a nice day, start the car, and use the windshield washer function until it completely runs out of water to empty the reservoir. Then, I buy a bottle of winter-specific windshield washer fluid, labeled with its antifreeze temperature—I usually choose the -20°C one for safety. Be careful when filling it up to avoid spills; using a funnel helps. After replacing it, test the spray to make sure it flows smoothly. An extra tip: don’t mix summer and winter fluids, as it reduces antifreeze performance. Changing it early helps avoid freezing risks—safety first.
