Only the brake fluid specification is critical. Q: Can I mix colors of brake fluid within my brake system?Ī: Yes, the color of the new brake fluid is not critical as long as the brake fluid specification matches what is recommended for your vehicle. Q: Can I use ACDelco Brake and Clutch Fluid, DOT 4 GMW in my vehicle that requires DOT 3?Ī: Yes, DOT 4 has a higher boiling point than DOT 3 and can be used instead of DOT 3. After refilling with clean fluid the system must be properly bled, otherwise the fluid level will be too low and the system may not work as needed. However, when changing the brake fluid the system must always be flushed first, this is the only way the system can be cleaned of contaminants. Q: Should I flush or bleed my current brake fluid before adding more?Ī: No, adding fluid is a normal practice as the brakes wear. After getting to a safe area it will be necessary to flush out the system and add the correct amount of new DOT 4 fluid.
Q: Can I use DOT 3 brake fluid interchangeably with DOT 4 if my vehicle’s manufacturer recommends a DOT 4 brake fluid but says DOT 3 can be added if necessary?Ī: No, DOT 3 can be added to a DOT 4 system but only if it is absolutely necessary, for example the fluid level is critically low. Additionally, change your brake fluid if the reservoir fluid is dark, murky or has significant contamination. Q: Should I periodically change or add more brake fluid to my brake system?Ī: Yes, add new fluid whenever the fluid reservoir shows fluid is needed. Correctly flushing, filling and bleeding the system is critical to braking performance. A: No, ACDelco recommends that only trained professionals change brake fluid.
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