I think have read DO NOT USE dot-5 brake fluid for vanagon.
causes corrosion.

I checked my stuff--added valvoline "synpower"(sythetic) exceeds dot-3 & 4 
nowhere does it say dot-5 or silicone.  It does say "synthetic formula".  

lesson:
Didn't notice that on label; just read good for brakes and hydraulic clutch...READ LABEL more carefully
(Of course, I never thought I had to do reasearch just to add brake fluid to a vehicle.)

I e-mailed question to valvoline but expect no response until Monday or tues.

Chris C
90 multivan