Brake Fluid Recommendation

[darc1722]

Just installed new powerbrake booster in 1969 Roadrunner and blew out brake lines, what brake fluid would best for new install?

 

[Dajkzo]

DOT 3 or DOT 4 are fine. DOT 4 has a higher temp rating and is prefered in ABS systems. I recall DOT 4 also has a slightly lower viscosity. The DOT 5 doesn't absorb moisture, but you shouldn't mix it with 3 or 4. I use Napa DOT 4 (made by Warrenlube). Just use new fluid and change it every other year to prevent moisture related issues.

 

[themechanic]

Just installed new powerbrake booster in 1969 Roadrunner and blew out brake lines, what brake fluid would best for new install?

Whatever is still in your calipers is required unless you completely flush out all brake parts.

 

[mtbase]

I went with DOT 5. More expensive, but won't damage paint if you have a leak. Can't mix with others. no regrets

 

[Photon440]

 

[Frankb]

I have always used DOT 3 without any fluid related brake failure. Ever. Due to rear upgrade I am installing new disc brake system on the rear axle. I purchased a complete rear system from Dr. Diff and he recommended DOT 4. So I am going to DOT 4.