NEW BRAKES....DOT 5?

Torn down many calipers in my day Rusty, no Dot 5, all Dot 3. That's my point. Dot 3 absorbs moisture from the atmosphere when you check the master and the open bottle. Just trying to wrap my head around things.

...and you've never seen rust in a caliper or wheel cylinder? I find that difficult to get "my" head around.