[Healeys] Brake Fluid

Oudesluys coudesluijs at chello.nl
Sat May 8 02:24:44 MDT 2010


Gary is correct here. DOT5.1 is basicly DOT 4 with the boiling 
characteristics improved to DOT5 level.
Overhere it is not that widely available though.
Kees Oudesluijs
NL.

Editorgary at aol.com wrote:
> To make the numbering system on brake fluid even more confusing, DOT 5.1 is 
> a non-silicone brake fluid, which is compatible with DOT 4 (and DOT 3, 
> which I don't think is even sold any more.)
>
> Castrol GT-LMA is rated as DOT 5.1 and is an excellent choice for systems 
> that have not been switched to silicone DOT 5 brake fluid. It has excellent 
> moisture management and heat tolerance characteristics. 
>
> But please, folks, let's not get started on preferences for silicone versus 
> non-silicone fluids. If the car has never had its brake fluid changed, then 
> it hasn't had the seals changed either, and should get replacement 
> non-silicone (Dot 4 or Dot 5.1) fluid.
>
> Cheers
> gary
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