GM Volt Forum banner

2017 Windshield Washer Reservoir Capacity (176 fl oz)

8023 Views 18 Replies 14 Participants Last post by  wordptom
Windshield Washer Reservoir Capacity -> 176 fl oz (1Gal + 48 oz)

2017 Gen 2 Volt (Red)

To estimate the Windshield Washer Reservoir Capacity I first siphoned out as much fluid as I could (little over 1/2 gallon of the blue stuff, fortunately not the orange or yellow used for brutal upstate deep of winter).

Next, I ran the windshield washer and wipers to empty (nice clean windows). It took five or so cycles (~10 second cycle max where it turns off by itself) to go to minimum flow, and I quit there. There are about three full 10 second cycles remaining (~30 seconds total of spray) after the low windshield washer fluid low warning message in the driver information console (DIC).

Then, I poured in 1 Gallon of tap water (128 oz). After that, it took another 3 full 2 cup (16 oz measuring cup) portions (16 oz each) to reach the very top part where the first taper is (just below the cap).

So, (bells and whistles here), I estimate the capacity to be about 128 + 48 oz, or about 176 fluid ounces!

Some water may have flowed into the system (below the bottle), however I did not prime or run the system with water in it. So the estimate might (?) include a little system capacity beyond the bottle.
1 - 4 of 19 Posts
The ww bottle capacity is not in the manual, and some were asking. Probably wanted to know if when near empty, can you just buy a new 1 Gal. bottle, fill the reservoir, and toss the bottle (yes).
Windshield Washer Fluid per 1 second Spritz ~ 1 oz ; 110 spritzes / Gal ; 154 sp full

Realized I should have measured how much fluid per spritz (probably about 1 second for a typical spritz)

So, took a more accurate measure of the time-out (10.5 seconds), and how much water to bring back up to the marker (12 oz) after a fully timed-out cycle.

That means a typical 1 second spritz uses about 1 ounce of ww fluid (actually a bit more at about 1.14 oz)

So, a one gallon bottle should provide about 110 1 second spritzes.

And, if I was close on the total system capacity, from a full tank to the top inner marker, one should get about 154 1 second spritzes. Also, there should be more than 20 1 second spritzes remaining after the low indicator warning comes on in the DIC (and plenty of room for a full gallon).

At about $3.50 per bottle including tax, that's about 3 cents a spritz!
See less See more
Summary - Quick Reference Gen 2 Windshield Washer Numbers

Quick Reference Gen 2 Windshield Washer System

Capacity ~176 oz

Low windshield washer fluid warning - ~ 20 - 40 oz remaining (should take a full gallon (128 oz) refill)

Fluid used / 1 second spritz ~1 oz
  • Like
Reactions: 1
1 - 4 of 19 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.