# Making your own windshield wiper fluid

**URL:** <https://community.cartalk.com/t/making-your-own-windshield-wiper-fluid/87150>\
**Category:** Maintenance/Repairs\
**Created:** [September 13, 2014, 11:00pm UTC](https://community.cartalk.com/t/making-your-own-windshield-wiper-fluid/87150 "2014-09-13T23:00:39Z")\
**Posts on this page:** 1\
**Showing post:** 35

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**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [September 14, 2014, 8:55pm UTC](https://community.cartalk.com/t/making-your-own-windshield-wiper-fluid/87150/35 "2014-09-14T20:55:11Z")

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"2 ounces ammonia, 2 ounces isopropanol, a few drops of dish soap, 28 ounces water. The ammonia and isopropanol depress the freezing point. "

That small amount of isopropanol and ammonia will get the freezing point down a little, maybe to 25F, so don’t assume it’ll work in the frozen north.

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