DOT 4 fluid has a higher boiling point that DOT 3 fluid

DOT 4 fluid has a lower boiling point than DOT 3 fluid

DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life

DOT 4 fluid is more resistance to freezing than DOT 3 fluid

brake drags

brake fades

vapour locking occurs in the brake lines

antilock braking system malfunctions

trapping

tapping

bleeding

cleaning

stopping distance becomes extremely long

front tyres skid across the road surface, and the vehicle spins around

rear tyres skid across the road surface, and the vehicle spins around

driver loses control over the steering, and the vehicle continues moving in its current direction

reduces the stopping distance

minimizes the brake fade

maintains directional control during braking by preventing the wheels from locking

prevents nose dives during braking and thereby postpones locking of the wheels