silicone brake fluid after 20 years

pantdinoMember

Silicone brake fluid was all the rage 20 years ago when I got my car, and that's what was in the car when I got it.

Gary Hall in particular was a big advocate of it.

The theory behind silicone fluid made sense to me, so despite dire predictions of horrible things happening if I didn't change it over, I never did. Mainly because of having to totally disassemble and rebuild the entire braking system.

So today I checked the reservoir and bled a bit of fluid out of one of the rear calipers. Both areas showed crystal clear, colorless fluid with no debris.
If this had been glycol fluid in there all that time it would have been brown mud that came out.

I probably would not choose silicone fluid at this point if I had to rebuild my brake system anyway, but I see no reason to change at this point. If 20 years isn't a good test, what is?

2/28/106:05 PM

Original Post

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