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.
Right. DOT3 absorbs moisture. That means it dilutes moisture with brake fluid. DOT5 does not absorb moisture. So, "wherever" moisture is in the system, there it is and will cause rust in that particular place quicker.
I'm not arguing for or against, just stating facts. I imagine, were I to build a brake system from the ground up on something, I might would use DOT5.
