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Mixing DOT 4 brake fluid with DOT 3 is generally not recommended, as they have different chemical properties and performance characteristics. DOT 4 has a higher boiling point than DOT 3, which can lead to reduced performance if mixed. If you need to add brake fluid, it's best to use the same type specified for your vehicle to ensure optimal braking performance and safety. Always consult your vehicle's owner manual for the correct brake fluid specification.

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4d ago

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