i had a problem with my brake fluid before... "evaporates" which i doubt. anyway, somebody correct me if i am wrong, but if you're leaking from after the brake master cyclinder (hardlines, hoses, etc...) you should be able to feel it in the pedal correct? it should become mushy because the fluid is no longer pressurized since there is a hole.

on the other hand... if you're leaking from the brake master cyclinder (as i was before) i never felt any difference in my pedal (ie: softer or firmer). my plastic resevoir was cracked.

 

help

 

The feel in the pedal could also depend on the size of the leak.

 

the fluid would have to be almost gone for the pedal to start going away.

 

if the leak is small like a wheel cylinder seaping you wont feel it untill you run the master dry. Berake fluid doesn't evaporate