Recommended method to freeze protect
Super K Windshield Washer Fluid
Add 38oz of methanol to 1 gallon of pre-mixed Super K Windshield Washer Fluid.
This will give you -18° protection.
For larger volume, do the half method
Combine half of a 55 gallon drum of methanol, 1/2 bottle of Super K (kin16), and fill with water. This will give you more than -20° protection, and still be very cost effective.
