| Conditions | Suggested Mix |
|---|
Mixing Your Own Washer Fluid
Concentrated washer fluid is far cheaper than premixed jugs, but only if you dilute it correctly. This tool tells you exactly how much concentrate and how much water to combine for any batch size, in gallons or liters, so you fill the reservoir without guesswork or waste.
Match the Dilution to the Season
Summer is about cutting bugs and road film, where a heavily diluted mix works fine. Winter is about freeze protection: too much water and the fluid freezes in the lines, cracks the reservoir, or burns out the pump. As temperatures fall, use more concentrate, and in a hard freeze run it full strength.
Water Quality Matters
Use distilled or clean water rather than hard tap water, which leaves mineral deposits that clog the fine spray nozzles over time. A clean mix sprays evenly and keeps the washer system working when you need clear glass most.
Frequently Asked Questions
Can I use plain water in summer?
In warm climates with no frost risk you can, but plain water grows algae, clogs nozzles, and does little for bugs. A little concentrate keeps the system clean and clears film better.
How do I know the freeze rating?
Check the concentrate label, which lists the protection temperature at full strength and sometimes when diluted. Never dilute below the coldest temperature you expect.
Will diluting hurt cleaning power?
Within the label range, no. Beyond it, cleaning and freeze protection both drop, so stay within the recommended ratios for your conditions.