EVERY body - please, please, please stop calling DOT4 MINERAL it is NOT. It is a synthetic oil based on Glycol-Ether.
https://en.wikipedia.org/wiki/Brake_fluid
Very few cars use Mineral oil (no DOT Spec - however Aerospace is DTD585)
If you put mineral oil in our cars then your seals will fail quickly - honest.
Although DOT5 Silicone is not Hygroscopic Hydroscopic it will take on water as does any liquid open to the elements.
Your pipes can still rust.
Roger