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· Super Moderator
10,956 Posts
Whatever your buying listed as -20f fluid maybe ain't.

If you've mixed it with some "non" winter stuff it will freeze. The reservoir holds quite a bit, better than 4L I think.
It's easily diluted. If you have only used a partial jug of it and the rest is non winter it may freeze easily. You can add some isopropyl to your tank to try and increase the freezing point until you can add enough of the winter product to keep it from freezing.
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