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Re: [Healeys] Which Brake Fluid?

To: healeys@autox.team.net
Subject: Re: [Healeys] Which Brake Fluid?
From: Bob Spidell <bspidell@comcast.net>
Date: Sat, 24 Jul 2021 18:00:43 -0700
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <CAL4ZEONGjf41c0rSmzX+nTVPHgBAOV=RjCjRUwkXLOzQtqWqGQ@mail.gmail.com> <a28a63a4-2605-4547-96f5-9e12fa066efe@me.com> <1485251345.715106.1627131805514@mail.yahoo.com> <CAPTa0B4CdEdqt6orZf-ujz=Di5KjYAHKAekuhPFq1hfgDAFg=w@mail.gmail.com> <CAKkXjqM=nggC1OJ1HS1vGGOQb-QVp36Y8LHX-vZQZMqXtaeEcQ@mail.gmail.com>
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FWIW, I've had DoT5 in my BJ8 for nearly 30 years with no issues, 
including bleeding. My dad put Lockheed DoT4 in our BN2--a complete new 
system--and it gelled when the car sat for a couple years. I tried 
Petrosin--BMW's bespoke brand--and several seals failed, with a 
crystalline residue, after just a few years. There was a thread on the 
BCF a while back on owners having failures with DoT3/4. Tom Monaco 
strongly recommends Castrol DoT4 'synthetic*' but, so far, I haven't 
been able to get a good pedal with it (I'm not blaming the fluid). Note 
DoT5 is not hygroscopic, but does need to be flushed occasionally since 
any water will pool and settle in low points.

* Some brands of BF are now calling their product 'synthetic,' which is 
odd since, AFAIK, no BF is made from naturally occurring compounds. I 
suspect this is marketing, to ride on the popularity of synthetic motor oil.


On 7/24/2021 3:15 PM, richard mayor via Healeys wrote:
> The military uses silicone because some military vehicles sit for long 
> periods of time when not in use..... waiting for that day when they 
> need to spring into action.   Silicone fluid is not the best 
> performance wise but because it does not accumulate moisture over 
> time, it is best for military vehicles that sit unused for long 
> periods of time.
>
> FWIW, I was in the military and I use DOT 3
>
>
> On Sat, Jul 24, 2021 at 6:19 AM Michael Oritt via Healeys 
>
>     "The military specifies Silicone brake fluid for a reason"
>
>     Not necessarily a good one.
>
>     Best--Michael Oritt
>
>     On Sat, Jul 24, 2021 at 9:04 AM warthodson--- via Healeys
>
>         I would like to say a few words on behalf of silicone brake
>         fluid.
>         It is non-hygroscopic (does not absorb moisture).
>         It does not damage paint as do glycol fluids.
>         A newly rebuilt and scrupulously clean brake system filled
>         with silicone fluid should outlast a system filled with glycol
>         fluid by several times.
>         The military specifies Silicone brake fluid for a reason.
>
>         Gary Hodson
>
>
>
>         On July 23, 2021 at 2:05 PM, Michael MacLean via Healeys
>
>>         The BN2 is at the point where it is time to fill and bleed
>>         the new brake system.  Now comes the time to decide whether
>>         to go with DOT 3/4 brake fluid or try silicone.  Any
>>         recommendations,  advice or warnings on this decision?
>>         Mike MacLean
>
>


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    FWIW, I've had DoT5 in my BJ8 for nearly 30 years with no issues,
    including bleeding. My dad put Lockheed DoT4 in our BN2--a complete
    new system--and it gelled when the car sat for a couple years. I
    tried Petrosin--BMW's bespoke brand--and several seals failed, with
    a crystalline residue, after just a few years. There was a thread on
    the BCF a while back on owners having failures with DoT3/4. Tom
    Monaco strongly recommends Castrol DoT4 'synthetic*' but, so far, I
    haven't been able to get a good pedal with it (I'm not blaming the
    fluid). Note DoT5 is not hygroscopic, but does need to be flushed
    occasionally since any water will pool and settle in low points.<br>
    <br>
    * Some brands of BF are now calling their product 'synthetic,' which
    is odd since, AFAIK, no BF is made from naturally occurring
    compounds. I suspect this is marketing, to ride on the popularity of
    synthetic motor oil.<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 7/24/2021 3:15 PM, richard mayor via
      Healeys wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAKkXjqM=nggC1OJ1HS1vGGOQb-QVp36Y8LHX-vZQZMqXtaeEcQ@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">
        <div>The military uses silicone because some military vehicles
          sit for long periods of time when not in use..... waiting for
          that day when they need to spring into action.   Silicone
          fluid is not the best performance wise but because it does not
          accumulate moisture over time, it is best for military
          vehicles that sit unused for long periods of time. <br>
        </div>
        <div><br>
        </div>
        <div>FWIW, I was in the military and I use DOT 3<br>
        </div>
        <div><br>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Sat, Jul 24, 2021 at 6:19
          AM Michael Oritt via Healeys &lt;<a
            href="mailto:healeys@autox.team.net"; 
moz-do-not-send="true">healeys@autox.team.net</a>&gt;
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div dir="ltr">
            <div class="gmail_default" style="color:rgb(51,51,255)">"<span
                style="color:rgb(0,0,0);font-family:&quot;Comic Sans
                MS&quot;,sans-serif;font-size:16px">The military
                specifies Silicone brake fluid for a reason"</span></div>
            <div class="gmail_default" style="color:rgb(51,51,255)"><span
                style="color:rgb(0,0,0);font-family:&quot;Comic Sans
                MS&quot;,sans-serif;font-size:16px"><br>
              </span></div>
            <div class="gmail_default" style="color:rgb(51,51,255)"><span
                style="color:rgb(0,0,0);font-family:&quot;Comic Sans
                MS&quot;,sans-serif;font-size:16px">Not necessarily a
                good one.</span></div>
            <div class="gmail_default" style="color:rgb(51,51,255)"><span
                style="color:rgb(0,0,0);font-family:&quot;Comic Sans
                MS&quot;,sans-serif;font-size:16px"><br>
              </span></div>
            <div class="gmail_default" style="color:rgb(51,51,255)"><span
                style="color:rgb(0,0,0);font-family:&quot;Comic Sans
                MS&quot;,sans-serif;font-size:16px">Best--Michael 
Oritt</span></div>
          </div>
          <br>
          <div class="gmail_quote">
            <div dir="ltr" class="gmail_attr">On Sat, Jul 24, 2021 at
              9:04 AM warthodson--- via Healeys &lt;<a
                href="mailto:healeys@autox.team.net"; target="_blank"
                moz-do-not-send="true">healeys@autox.team.net</a>&gt;
              wrote:<br>
            </div>
            <blockquote class="gmail_quote" style="margin:0px 0px 0px
              0.8ex;border-left:1px solid
              rgb(204,204,204);padding-left:1ex">
              <div style="color:black;font:12pt &quot;Comic Sans
                MS&quot;,sans-serif">I would like to say a few words on
                behalf of silicone brake fluid.
                <div>It is non-hygroscopic (does not absorb moisture).</div>
                <div><font size="3">It does not damage paint as do
                    glycol fluids.</font><br>
                </div>
                <div><font size="3">A newly rebuilt and scrupulously
                    clean brake system filled with silicone fluid should
                    outlast a system filled with glycol fluid by several
                    times.<br>
                  </font></div>
                <div>The military specifies Silicone brake fluid for a
                  reason. <br>
                  <br>
                  Gary Hodson<br>
                  <br>
                  <div
                    
style="font-family:arial,helvetica;font-size:10pt;color:black"><font
                      size="2"><br>
                      <div
id="gmail-m_2478624642646800173gmail-m_-1908300146633513305yiv1034049189">
                        <div>
                          <div
id="gmail-m_2478624642646800173gmail-m_-1908300146633513305yiv1034049189yqt63377">
                            <div><br clear="none">
                              On July 23, 2021 at 2:05 PM, Michael
                              MacLean via Healeys &lt;<a
                                href="mailto:healeys@autox.team.net";
                                target="_blank" 
moz-do-not-send="true">healeys@autox.team.net</a>&gt;
                              wrote:<br clear="none">
                              <br clear="none">
                            </div>
                            <div>
                              <blockquote type="cite">
                                <div>
                                  <div>The BN2 is at the point where it
                                    is time to fill and bleed the new
                                    brake system.  Now comes the time to
                                    decide whether to go with DOT 3/4
                                    brake fluid or try silicone.  Any
                                    recommendations,  advice or warnings
                                    on this decision?
                                    <div>Mike MacLean</div>
                                  </div>
                                </div>
                              </blockquote>
                            </div>
                          </div>
                        </div>
                      </div>
                      <div
                        
id="gmail-m_2478624642646800173gmail-m_-1908300146633513305yqt85392"><br
                          clear="none">
                      </div>
                    </font></div>
                </div>
              </div>
              <br>
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        </blockquote>
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