I switched to ALL water with two bottles of Redline Water Wetter this year. Now it's getting cold in the Northeast, it's time for me to drain and fill the radiator with anti-freeze and then let it cycle through the block.....so I don't find myself with a cracked block in the spring......

Already tested mine to 0F since I never drained the antifreeze after last year. Hopefully, I'll have the motor pulled before it gets any colder

I forgot to do this in the fall between the wedding, honeymoon, new house! Crap....I'm going to have to test it when I get home and keep my fingers crossed....it's been down to -10 this year, and well below freezing often. I'm not sure what the temp differential is in the garage. I hope there is enough anti-freeze in the system from the last drain to keep me protected.

Is quite happy to have a heated garage these days...

It was so warm last week I thought I'd check the water and temperature at the beach myself.

Luckily I checked the coolant and it was good to -10ish and I know the garage probably never got below 10-25F on the worst days if even that cold. Phew....