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Brake Fluid Compatibility

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Old Apr 21, 2014 | 01:11 PM
  #1  
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Brake Fluid Compatibility

At issue is a '69 Mach 1, front calipers, rear drums. Stock fluid in brake system. The car is up on jackstands awaiting the machine shop on a major rebuild.
I am looking at a quart of Johnsen's Synthetic DOT-3 brake fluid and want to flush the brake system with it. There is nothing on the label about Silicone. The parts monkey said it was okay to use it.
My question is: Is this fluid compatible with stock fluid?
We would appreciate advice.

Semper Fi
 
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Old Apr 21, 2014 | 05:26 PM
  #2  
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Yes....that is what was used ... DOT 3.

In the 70's they came out with DOT 4, but it was approved to be used with DOT 3...and then they changed the labeling to DOT 3/4.
 
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Old Apr 26, 2014 | 02:13 AM
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Stick with DOT 3
 
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Old Apr 27, 2014 | 01:20 PM
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Silicone fluid is DOT-5
 
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