Mix up a gallon in anothe jug.
Add as needed.
Sorry, no idea on the capacity.

 

Mix up a gallon in anothe jug.
Add as needed.
.

^^^^^^
What he said, I do that with coolant.

 

I was empty just the other day and had about 3/4 of a gallon left from the previous time I filled it. It took it all....barely.

So if I had to guessitmate, I would say 3/4 of a gallon.

 

It is just a few ounces short of a gallon completely empty

 

So what is this mysterious addative we are so concerned about ?

 

It is just a little more than 3/4. Don't worry about additives, just use the orange rainx. But stay away from rainx wiper blades. Personally all the ones I've bought have streaked like crazy out of the package til i get rid of them.

Sent from my DROID RAZR using Tapatalk 2

 

Thanks to everyone for the suggestions.

The mystery additive is RAINX. I purposley didn't mention the product at first so as to keep the discussion about the tank capacity, not about the product.

 

Thanks to everyone for the suggestions.

The mystery additive is RAINX. I purposley didn't mention the product at first so as to keep the discussion about the tank capacity, not about the product.

No tinfoil hat for you

 

That's what I thought but we were having fun

 

From others that I've talked with the RAINX works better the more you use it. It supposedly works its way into the pours of the glass making a "film" so to speak. If you stop using it then ordinary washer fluid negates its value. I never use it but its what I hear.

I just wish that all cars would just accept the standard 1 gal washer fluid (the blue stuff) as it comes from the store. I suppose the plastic bottle would need to be upgraded or something. Then I wouldn't have to store it. Just buy a gal when I'm out and install the whole bottle. Maybe returnable bottles like soda cans and propane tanks that can be refilled or recycled. As it is the bottles we buy it in only get thrown out.

 

I have never run my washer bottle dry. So I am not concerned with the capacity.
I just top it up every so often when I am checking things under the hood.


As far as Rain X, I have alays used the type that you apply to the windshield with a soft cloth.
Never tried the washer addative, maybe I should.
My worst problem is getting and keeping the inside of the windshield clean.

 

My worst problem is getting and keeping the inside of the windshield clean.

Yea, I know where you're coming from. I use to be very diligent about that.

 

Living in Northern BC in the winter I would run the things dry every few days. The tank can almost hold a whole regular sized bottle of fluid.