Frequently asked questions about DOT4 brake fluid
Read our FAQs about DOT4 brake fluid. Find answers and practical tips from real CROP specialists. Have you read them? Continue to all DOT4 brake fluid.
Is every DOT 4 brake fluid the same?
No, not every DOT 4 brake fluid is the same. They all meet the DOT 4 specification, but boiling point, additives and compatibility with older systems can differ by brand.
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Can I top up with DOT 4 brake fluid?
Yes, you can top up DOT 4 brake fluid in the reservoir of your brake system. Make sure you use clean fluid and keep the level between the indicated marks.
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What colour is DOT 4 brake fluid?
DOT 4 brake fluid is usually transparent to light yellow. The colour can vary slightly by brand, but clear or light yellow is standard.
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Which DOT 4 brake fluid?
Good DOT 4 brake fluid is a product that meets the DOT 4 specification and is suitable for your car. Well-known brands include Castrol, Liqui Moly, Total and Petronas, all of which provide reliable protection against overheating and corrosion.
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Can I mix DOT3 and DOT4 brake fluid?
Yes, DOT 3 and DOT 4 brake fluids can be mixed because they are both glycol-based. Keep in mind that mixing may slightly lower the boiling point, which can slightly reduce performance.
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What is the boiling point of DOT 4 brake fluid?
The boiling point of DOT 4 brake fluid is usually around 230°C dry and 155°C wet (with moisture absorption). The high boiling point ensures that the brakes continue to work safely even under heavy load.
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