Hey all. I was just out at walmart and saw some of this rain-x washer fluid additive that i'd really like to use and it was only like 3 dollars or something:



Anyway, this says that it treats 4 gallons of fluid. Does anyone have any idea of the capacity of washer fluid? My tank is basically full, but I have no idea how many gallons that is, so I don't know how much to use! Thanks!

 

I think its about one gallon.
I bought winsheild wiper fliud and it took the whole bottle.

 

1 gallon pretty much fills it.

 

Ah great. Thanks guys. Mine usually takes about 1/2 gallon, but I never know how much was actually left. Alright, so i'll use 1/4 of it. Thanks!

 

I have owned a few cars that take just under a gallon to completely fill... which is pretty annoying. Like I want 1/4 gallon of stuff sitting around

But yeah, if this one runs dry you can fit a gallon in it.

 

yup at least one gallon