The difference between DOT 3 and DOT 4 brake fluids is

• DOT 4 fluid has a higher boiling point than 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 resistant to freezing than DOT 3 fluid