[Healeys] Brake Fluid

[Bob Spidell]

"... There is a newer Glycol Ester DOT5 ..."

I think you're referring to 'DoT5.1'  I also think it was deliberately 
named so as to confuse the issue.


On 10/30/2022 8:05 PM, Christopher Moog via Healeys wrote:
> 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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