sure you could.
without looking, I think Vanagons call for Dot 3.
correct me if I am wrong of course.
Dot 4 is overkill really.  'better' yes, but I doubt anyone will get their
brake fluid anywhere near the higher boiling point of Dot 4, or even Dot 3
if they have half a brain.

If you're brakes start fading from overuse on a big descent ..........you
better easy off way before any brake fluid boiling can occur !
A person would have to be clueless or dense to get heavily into serious
brake fad  and not stop driving for a little while at least ! '
I doubt Dot 4 lasts better than Dot 3 or anything like that.
Scott

----- Original Message -----
From: "Jeff Lincoln" <magikvw@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, September 27, 2008 5:33 PM
Subject: Dot 3 brake fluid question

> Ok gang - I know the Vanagon calls for Dot 4 brake fluid but could one use
> Dot 3 temporarily just to get a bus up and running to check that other
> things are working properly? Maybe a very short test drive. Then bleed out
> the Dot 3 and replace it with Dot 4 when it's time to drive on a regular
> basis.
>
>
>
> Thanks,
>
> Jeff
> '90 Carat (Grover)
> '86 (We call this one Parts)
> '78 Bus (Melissa) Patty's Bus