How to Winterize Your Vehicle's Washer Fluid and Wipers

Two of the most commonly neglected winter vehicle preparations are windshield washer fluid and wiper blades. Both are inexpensive and quick to address, and both can make driving in Indiana winter conditions significantly safer and less frustrating.

Windshield Washer Fluid

Summer windshield washer fluid is formulated primarily for cleaning, not freeze protection. Many summer fluids begin freezing at temperatures around 32°F. When summer fluid freezes in the washer reservoir, it can crack the reservoir and pump. When it freezes in the spray nozzles, no fluid reaches the windshield despite the pump running. When it freezes on contact with a cold windshield, it creates an ice film rather than cleaning.

Winter washer fluid rated to -20°F or -40°F contains methanol that prevents freezing and also melts ice and snow on contact with the glass. It costs $3 to $7 per gallon at any auto parts store. Before the first expected freeze, drain or use up the summer fluid and switch entirely to winter-rated fluid. Do not mix the two, as dilution reduces freeze protection.

Wiper Blades

Standard all-season wiper blades have a metal frame that collects ice and snow during winter storms. As the frame ices up, it prevents the blade from conforming to the windshield curvature, leaving streaks and unwiped areas. Winter wiper blades wrap the entire frame in a rubber boot that prevents ice accumulation. They cost $15 to $30 per blade at auto parts stores and take five minutes to install.

The Annual Wiper Check

Even if you use winter blades, inspect them before each winter season. Rubber deteriorates with age and UV exposure. A blade that chatters, skips, or leaves streaks is past its useful life regardless of its type. Wiper blades should be replaced every 6 to 12 months or when performance declines.

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Frequently Asked Questions

What happens if summer washer fluid freezes in the reservoir?

Summer washer fluid that freezes in the reservoir can crack the reservoir and washer fluid pump. It also freezes in the lines and nozzles, preventing any spray when you need it most. Switching to winter fluid before the first freeze prevents all of these issues.

When should I switch to winter wiper blades?

Install winter wiper blades before the first expected freezing precipitation, typically October or early November in Indiana. Winter wiper blades have a rubber boot covering the blade frame that prevents ice and snow from accumulating in the blade mechanism.

Can I just dilute summer washer fluid with water for winter?

No. Water reduces the freeze protection rather than increasing it. Summer concentrate diluted with water freezes at approximately the same temperature as water, which is useless in winter conditions. Use a dedicated winter washer fluid rated to at least -20°F.