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The DOT ratings are US Department of Transportation boiling point
ratings (wet boiling I think) so DOT5 silicone boils the same range
of temperatures as DOT5.1. 5 only denotes temperature range so not
deliberately confusing but incidentally confusing.<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/31/2022 12:35 AM, Bob Spidell
wrote:<br>
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cite="mid:40c9eb9a-d256-d7a7-af13-d1c36882195e@comcast.net">
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"... There is a newer Glycol Ester DOT5 ..."<br>
<br>
I think you're referring to 'DoT5.1' I also think it was
deliberately named so as to confuse the issue.<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/30/2022 8:05 PM, Christopher
Moog via Healeys wrote:<br>
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I've used both. Currently prefer DOT4.<br>
<br>
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.<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/30/2022 10:00 PM, Alan
Seigrist wrote:<br>
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<div dir="ltr">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.<br>
<br>
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.<br>
<br>
Dot 4, if the car is not used regularly, needs to be flushed
every couple of years.<br>
<br>
<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Oct 31, 2022 at
5:43 AM Michael MacLean <<a
href="mailto:springer.mike51@gmail.com"
moz-do-not-send="true" class="moz-txt-link-freetext">springer.mike51@gmail.com</a>>
wrote:<br>
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0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
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<div>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?</div>
<div>Mike MacLean<br>
</div>
</div>
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