use the dot 4, it has a higher boiling point.. also, make certain to keep
the fluid moisture-free.  the main thing happening with "brake-fade" is
that any moisture in the fluid turns to steam as the fluid heats up under
hard use... thus causing a soft pedal...Steam is compressible... keep the
fluid "dry"
  I changed the brake fluid before every race in my P-race car.  I always
used fluid from a scrupulously sealed container...

.

On Fri, May 4, 2018, 3:35 PM Jack R <jack007@comcast.net> wrote:

> DOT3 & 4 can safely be mixed. HOWEVER DOT5 (or 5.1) brake fluid is
> silicone based and must NEVER be mixed with DOT3 or 4.
>
> I run Castrol Dot 4 in my Westy.
>
> https://www.summitracing.com/parts/csx-1261412504?seid=srese1&cm_mmc=pla-google-_-shopping-_-srese1-_-castrol&gclid=EAIaIQobChMIuKzX9ozt2gIVW7nACh3BPw6WEAYYAyABEgJWKvD_BwE
>
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> Of David McNeely
> Sent: Friday, May 4, 2018 2:37 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Brake fluid
>
> IIRC (but check the owner's manual), the correct brake fluid for the
> Vanagon is DOT 3.  It matters, because they have different volatility, and
> different ignition temperatures.  Whether they are mutually soluble or not,
> I am not certain, but I would not mix them, just as I would use the type
> recommended by VW.
>
> On Fri, May 4, 2018 at 9:27 AM, ddbjorkman@verizon.net <
> ddbjorkman@verizon.net> wrote:
>
> > Can one mix Dot 3 and Dot 4 brake fluid in a Vanagon brake system, or is
> > that not recommended?
> >
> > Dave B.
> >
>