So DOT 4 is ok PROVIDED you change brake fluid every other year or so, and DOT 5 is ok PROVIDED you flush your system thouroughly and get rid of absolutely all old brake fluid before you fill in DOT 5 silicone.I went for the second alternative. I know plenty of Morganeers that do not remember when they changed DOT 4 last time - possibly dangerous, but to err is human.
I took exeptional care with flushing when I changed to DOT 5, so I think that problem is taken care of once and for all. And I need not worry about the DOT 4 absorbing water and thus lowering the boiling temperature, neither the water content in the fluid sinking to the bottom of the system possibly inducing corrosion, when the car is stored for a long time during winter. So silicone for me. Cannot see why not, again provided you do the fluid change job to perfection - once. Now, I have a fairly modern car - 2004, so there should be no issue with rubber sealings, gaskets etc.Wether this is a problem with old cars, I do not know.
