Silicone Brake Fluid
I'm going through my car from the ground up and that's why I'm changing everything. If I was just going to change over I'd change all the rubber components... after all how many of us have a list we go by saying at X many miles (or KM) or X many years change your brake hoses. I'm the type that would rather know it's all good and I won't have to waist the one nice day (that I have off) screwing with my brakes and not driving around making fun of kids with fart cans for exhaust tips.