Quote:
Originally Posted by NONE_too_SOFT
Use whats called for w/ the specific brake system you have. if you've got aftermarket parts on your brakes i'd consult them, rather than what the OEM calls for.
I've heard that using High Temp DOT 5 will reduce Spongy feel during intense/frequent braking. have yet to test it, but i've got some in the mail.
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If you're getting US Dot 5, be careful about mixing it with even a trace of Dot 4, as it turns to goop. There a whole procedure for switching it over you need to follow.
Dot 5 doesn't absorb moisture, which reduces the boiling point of Dot 4 brake fluids, But your brake system will still collect condensation, and then you get water settling to the lowest point it can get to, and if it gets into the calipers, you still boil it, and it corrodes everything it touches.
Apparently, there have been a lot of expensive cars that had dot 5 put in during restorations, and had the brake systems ruined from condensation.