Rick,
I think you are mixing up synthetic (DOT 4) and silicone
(DOT 5) fluid.  Silicone is a no-no.  Synthetic is chemically
not all that different from Castrol LMA.  Synthetic DOT 4
fluid is not a silicone fluid, but a Polyalkylene Glycol Ether
fluid, as is the Castrol.
Jerry Mouton                              "Laissez les bons temps rouler!"
----- Original Message ----- 
From: "Rick Brown" <rbrown7@covad.net>
> Don't use synthetic fluid in a race car.  It is true that its non-
> hydroscopic which is a big advantage for a show car or one that sits
> around alot.  However, silicone fluid is actually somewhat compressible
> which gives a soft pedal feel.
 
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