Is Synthetic Brake Fluid a Marketing Gimmick?

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Onizukachan

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Buzzword.

I’ve seen gluten free carrots and other veggies, I’ve seen gluten free meat. Like, duh, it always was…


synthetic became that way a couple decades ago.

until I find a brake fluid bearing rock, I would assume they are all synthetic.

I will however issue this caution… don’t ever put dot 3 in a system that is dot 4, especially if British.
I had to rebuild a perfectly fine clutch slave and master because I did I that pre internet. Within a couple days the dot 3 ate the seals and it was gushing out With each depress.
 

Erik the Awful

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DOT3, DOT4, and DOT5.1 should all be compatible. DOT5 is not. Old British cars aren't well-known for keeping their fluids on the inside.

Seems like the truth has become a gimmick.
Liars don't like being easily spotted, so they do everything they can to make the truth appear as a lie. If you tell the truth 99% of the time, but you mistakenly say something wrong 1% of the time, the 90% liar will try to equate your mistake with his lies. Hence, people listen to the proven liar over a normally truthful source because "everybody lies".
 

RichLo

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^ So much truth to that.

And its become standard practice to cherry pick statistics or make false statistics to fit a narrative to continue a one-sided conversation instead of listening to actual facts and changing your mind and changing the narrative based on real facts and truth. This is coming from both sides...

How many real people think 18 and 19 year old adults are considered 'children'?

How many real people think there were millions of cases of voter fraud across multiple states?
 

0xDEADBEEF

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DOT3, DOT4, and DOT5.1 should all be compatible. DOT5 is not. Old British cars aren't well-known for keeping their fluids on the inside.

I actually had a similar problem on my C5. I used my mightyvac to suck out the old fluid in the clutch master and replaced it with Motul 5.1. A month later the slave was dead and the fluid was totally black.
 

Erik the Awful

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The issue likely wasn't the fluid, but rather the rubber deteriorating with age. If you'd replaced it with the same type of new fluid it probably would have gone dead as well.

When I was a tech we always replaced the master, slave, and hose as a set. If you didn't, the other components were going to fail soon after. If you don't bleed the brakes with new fluid occasionally (who does?) replacing the old fluid with fresh fluid often causes sudden leaks. Brake/clutch hydraulics are weird and problematic like that.
 
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