The brake system uses a glycol-based hydraulic fluid. Brake fluid absorbs moisture over time
which causes it to break down. It should be changed at least every two years or when the
brakes are repaired or replaced.
The U.S. Department of Transportation issues specifications for brake fluid. Brake fluids are
broken down into these categories: DOT3, DOT4 and DOT5
DOT3, DOT4 - glycol based brake fluids (these absorb water, have lower boiling points and
are good for most passenger cars and trucks under normal driving conditions)
DOT5 - silicon based brake fluid (does not absorb water, higher boiling point and can
prevent corrosion for vehicles in wet regions or that are not driven for long periods of time)
WARNING: DOT5 is not recommended for ANY vehicle equipped with antilock
brakes!
Notes:
DO check your owner's manual for the recommended brake fluid for your vehicle.
DO check the boiling point of your brake fluid for your region and driving conditions.
DO NOT MIX different types of brake fluid. They may not mix well and could cause serious damage.
DO NOT SPILL DOT3 or DOT4 brake fluid on your car's paint. They will corrode your paint.
As always, if you are uncertain, ask a certified professional.
