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Brake/ clutch master cylinder fluid

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Old Aug 28, 2020 | 01:25 PM
  #1  
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alod3794
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Brake/ clutch master cylinder fluid

Does anyone know what fluid type is recommended for the brake/ clutch master cylinder?

1987 f250
6.9 ZF5
 
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Old Aug 28, 2020 | 05:32 PM
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DOT 3 is OEM
 
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Old Aug 28, 2020 | 11:13 PM
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tecgod13
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From: Western Mass
Originally Posted by lonewolf_
DOT 3 is OEM
Meaning brake fluid....

I think I've been using valvoline DOT 4 which might be a fancier DOT 3, don't quite remember, but it works fine in the clutch and brakes.
 
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Old Aug 28, 2020 | 11:27 PM
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Originally Posted by lonewolf_
DOT 3 is OEM
sweet thank you
 
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Old Aug 29, 2020 | 12:09 AM
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DOT 3 is conventional

DOT 4 is synthetic

They're not supposed to be mixed, but like any other oils it's probably fine but research it first. DOT 4 is rater for higher temps and longer life.
 
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Old Aug 29, 2020 | 07:23 AM
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Originally Posted by DarkOverCast
DOT 3 is conventional

DOT 4 is synthetic

They're not supposed to be mixed, but like any other oils it's probably fine but research it first. DOT 4 is rater for higher temps and longer life.
I’d use dot 4 but like you said I also heard you shouldn’t mix the two and don’t feel like draining the whole system. I’m gonna just flush the reservoirs a couple times and just replace with the amount of dot3 that came out
 
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