Brake fluid should be regularly changed every year at a minimum. You
can tell the brake fluid is getting "bad" by the color (it gets darker) or
if the fluid feels slimey (from absorbing water). Brake fluid (glycol-based),
by nature, is hygroscopic - it absorbs water readily from the atmosphere.
High humidity climates would make this absorption even worse. Water in the
brake fluid/system degardes braking performance by decreasing boiling point.
In extreme cases, water-logged brake fluid can cause corrision of the brake
components from the inside out!
Stick with DOT 3 or DOT 4 fluids. Do NOT use DOT 5, silicone-based fluid.
This DOT 5 silicone-based brake fluid is not designed for vehicles used for
Recently, there has been a new DOT 5.1 (racing) brake fluid avaialble.
Please read all instructions for proper use of this type of fluid.
Popular types of brake fluid are made from Castrol (GT/LMA) and
Valvoline Synthetic (gold, plastic bottle).
Check out our brake fluids page in the Mods section here:
Click here for the brake fluids page in the Mods section!
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