So around a year ago I had to add a little cooling to my truck. Since then, I have added water as well and I am unsure if the mix is enough to keep it from freezing during winter. This is a quick drain and fill to ensure that the cooling system will not freeze during winter and blow out a freeze plug. This job is super easy and anyone can do it with a little patience. The parts store said that it is a 28 quart system, and I believe that's when it's dry. I added about 20 quarts to complete this process. Hope you guys find this helpful!!!