I had a test today, and in the test, it had a question
"What is brake fluid made of?" or something in that line
there were four choices and the correct answer was "glycol and alcohol"
but i chose "silicone and alcohol" since DOT5 is a silicone based fluid.

but..... alcohol..... does DOT 5 contain any alcohol? If it does, i would be able to get another point on my test

does anyone have a link to prove this? or prove me wrong?
thanx

 

hrm... i think i answered myself....
DOT 3 and 4 includes alcohol... that makes them hydroscopic (sucks moisture)
and DOT 5 is said to be not hydroscopic. Alcohol sucks moisture, so that would make DOT 5 have no alcohol....

so i guess i was wrong...
eh no extra point for me....

 

Unless, they specifically asked DOT3,4, or 5, I think you could fight it. Just do some research on google.

 

Not to be a nit-picker, but its hyGroscopic, not hyDro.

 

LOL yeah, sorry, its hyGroscopic
hehehe
anyway, yeah, i was searching through, but the only info i can find is that to flush the DOT 3 or 4 with alcohol before changing it to DOT 5, which would make no sense. since that would take make the DOT 5 contaminated with alcohol, making it hygroscopic.....

any info would be appreciated

 

What's better to run in a race car, Dot 4 or Dot 5? I'm in the process of changing my brake system.

 

It seems like its either DOT 5 or DOT 5.1
DOT 5.1 is still gycol based, so no flushing needed

 

The Earl's (no relation) catalog says never to use Dot 5 for high performance apps.

 

Goodridge also recomends not using it because it may not be compatable with some of their internal parts. Also heard that its not compatible with ABS.

 

Yeah, ive seen that before. but it seems that DOT 5 does no damage to the rubber cups and stuff.

DOT 5.1 I think is the best choice. no need to flush, still glycol based. but i havent seen it being sold around in my area.

P.S. also, DOT 5 is supposed to give a spongy feel compared to the other brake fluids.


[Modified by Raz1983, 5:54 AM 11/23/2002]