Re: Subject: Silicone Brake Fluid vs. ATE Super Blue

[Porsray@aol.com]

Glen, from my experince Supe Blue is totally compatible with other DOT 4
brake fluids.  I am using it in my 993 presetnly, which has been to approx.
4 race track driver's education events so far.  Pedal is firm, and system 
bleeds/flushes out fine.  Several local track junkies run it too; I feel the
bad stuff is silicone (DOT 5) fluid, not Super Blue.  I haven't gone this
far on the Quattro - but I do use Castrol LMA.

What makes it higher temperature I think is the same principle that makes 
higher weight oil survive higher temperature (i.e., lower viscosity).


Ray Calvo (porsray@aol.com)
1990 Coupe Quattro

In a message dated 96-08-01 11:31:27 EDT, you write:

<< From: Glenn Lawton <lawtonglenn@gsmai.com>
 Date: Thu, 01 Aug 1996 10:40:51 -0600
 Subject: Silicone Brake Fluid vs. ATE Super Blue
 
 Sorry to have to ask again, but I am still confused.
 
 I gave my mechanic a litre of ATE Super Blue, but he
 didn't really want to install it. He has many other
 customers that track their cars, and said that
 several (Porsche) guys used to run it, but had
 problems (undefined), so they switched back to "regular"
 DOT4 fluid.
 
 Since I have always run "regular" DOT4 at the track
 and have been OK, I took the cautious route, and
 did it again.
 
 However, I think perhaps that the Porsche guys had
 problems with silicone DOT5, not with ATE Super Blue,
 which, as far as I can tell is:
 	Not Silicone
 	Not DOT5
 
 Am I nuts? Am I confused? What's wrong with high
 temperature DOT4? How do they make it high temperature?
 
 Glenn Lawton
 1983 TQC
 1990 20V QC
 1986 4KQ
 1985 230TE
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