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Which DOT is which?

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Old Oct 21, 2007 | 02:30 PM
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Default Which DOT is which?

Drawing a mental blank.

DOT 3 brake fluid is colorless?

DOT 4 is ? Purple?

DOT 5 (Synthetic) is ?

Brakes are kind of spongey and I want to bleed them but want to make sure I don't mix

While I'm at it, here is one of the more interesting and comprehensive write ups on brake fluids that I've found in a while:

http://www.stoptech.com/tech_info/wp...fluid_1a.shtml
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Old Oct 21, 2007 | 04:31 PM
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Dot 3 and 4 are clear/amber....Dot 5 is synthetic and purple....You can mix 3 and 4. Do not mix anything with 5...
Reid '72 t-top
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Old Oct 21, 2007 | 04:58 PM
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I think one company makes DOT 3 or 4 in two different colors, so you can tell when you've fully flushed the system. Something I read about a long time ago, but I haven't heard anything about it for quite a while.
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Old Oct 22, 2007 | 04:59 PM
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There was a lot of information in that article (probably way more than I ever wanted to know about brake fluid). I wonder how much of this has any real impact on the average daily driver.
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Old Oct 22, 2007 | 05:37 PM
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Originally Posted by I'm Batman
I think one company makes DOT 3 or 4 in two different colors, so you can tell when you've fully flushed the system. Something I read about a long time ago, but I haven't heard anything about it for quite a while.
ATE. Blue and Amber.
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Old Oct 23, 2007 | 04:28 PM
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If you're unsure of what's in your system, put a little bit of what's in the master in a jar and add a bit of water. Silicone won't mix with water, the others will.
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