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Brake fluid change...how often?

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Old 15 January 2012, 04:46 PM
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scooby red
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Default Brake fluid change...how often?

As title really. How often should you change the brake fluid? The car only does a few thousand miles a year and is not used for track days etc.
What grade also, cheers in advance
Old 15 January 2012, 04:54 PM
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chopperman
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Use DOT 4 or DOT 5.1. only really needs changing every 2 or 3 years unless your racing.

Do NOT use DOT 5. To use this you would need to flush and its no good for vehicles with abs. Its used more in old classic cars. Plus DOT 5.1 has a higher boiling point anyway. DOT 5 will not mix with any other brake fluid.

Last edited by chopperman; 15 January 2012 at 04:57 PM.
Old 15 January 2012, 05:07 PM
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thanks matey
Old 15 January 2012, 06:47 PM
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So does 5.1 mix ok with dot 4 then? Was wondering if it actually makes any difference?
Old 15 January 2012, 09:13 PM
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MattJ85
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Doing a total brake change is it worth replacing the fluid ?
Old 15 January 2012, 11:48 PM
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chopperman
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Originally Posted by Scoobyno1
So does 5.1 mix ok with dot 4 then? Was wondering if it actually makes any difference?
5.1 will mix with dot 3 and dot 4. The odd one out is dot 5 which will not mix.

DOT 5 is silicone based
DOT 3, 4 and 5.1 is Polyethylene glycol base.

The difference in Dot 3, 4 and 5.1 is its boiling point. The higher number having the higher point so better.

Last edited by chopperman; 15 January 2012 at 11:51 PM.
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