Was away for a few days and just saw this reply. Yeah, brake fluid is super corrosive, especially on glass. The DOT rating (3, 4, 5, etc.) doesn’t play a role in how corrosive it is, it’s more about the different additives and composition of the specific fluid and what it’s service life is. The more you know…
elucubra@sopuli.xyz 2 days ago
Yeah, Ive been working on engines (mostly my own, for fun) for decades, and I never knew about brake fluid and glass.