The maintenance manual for my ASW 20C glider says to be sure to only
use "mineral oil" based brake fluid for the hydraulic brake system.
As far as I can tell, DOT 3 and DOT 4 brake fluids are glycol based,
and DOT 5 is silicone based according to my 15 minutes of research on
the internet. The problem is, I still can't tell if any of these meet
Schleicher's admonition to only use mineral oil based brake fluid. I
would suspect that of the three, that the DOT 5 silicone based fluid
appears to be the right one. Can anyone corroborate this? Anybody
know the "right" answer?
Thanks,