[Healeys] Brake Fluid

[Christopher Moog]

I've used both. Currently prefer DOT4.

Also everyone is speaking of DOT5 but there are now two different DOT5s. 
The first is the older silicone based DOT5. There is a newer Glycol 
Ester DOT5 that is compatible with DOT3 and DOT4. It has a lower 
viscosity than the DOT3 and DOT4 so it works better in some ABS systems. 
It also has a higher boiling point than DOT3 and DOT4. Don't see an 
advantage in Healeys.


On 10/30/2022 10:00 PM, Alan Seigrist wrote:
> The best selling point for Dot 4 is you can mix any Dot 4 or even Dot 
> 3 if you need to fill up.  As I understand it with Dot 5 you should be 
> careful to always use the same brand to fill up if necessary.
>
> Also, neither Dot 5 not Dot 4 is great for sitting a long time, Dot 4 
> absorbs water, Dot 5 will push any water down into the components.
>
> Dot 4, if the car is not used regularly, needs to be flushed every 
> couple of years.
>
>
>
> On Mon, Oct 31, 2022 at 5:43 AM Michael MacLean 
> <springer.mike51 at gmail.com> wrote:
>
>     At this point in the restoration I have a completely rebuilt brake
>     system with all new components and tubing. Now is the time to make
>     the decision to use DOT 4 or Silicone.  What's the consensus, if
>     there is one?
>     Mike MacLean
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