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Topic: What do all the DOT's mean? (Brake Fluid)

in Forum: C3 Driveline Components


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What do all the DOT's mean? (Brake Fluid)

Posted: 1/4/23 9:06am Message 1 of 4
Kenny78
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Toms River, NJ - USA
Joined: 7/28/2004
Posts: 116
Vette(s): 1978 Silver Anniversary Coupe Lt. Biege w/ Dark Brown Int. Happily owned since 1981.

Hi all,

What do  all the different DOT's meanšŸ¤”.Decided to go with Dot 5 synthetic brake fluid . Head to local store to purchase and discovered there are DOT 3, 4, 5, 5.1 and 4&5 which are all synthetic. Now I am totally baffled on which DOT to choose. šŸ¤¦‍ā™‚ļøThe brands were Prestone and Car Quest. Should I stay with the Chevrolet recommended DOT 3 and switch to synthetic DOT 3 or go with Dot 5 since I do not drive it a lot. Thanks for any clarification on this.




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Re: What do all the DOT's mean? (Brake Fluid)

Posted: 1/4/23 9:33am Message 2 of 4
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Adam Wartell
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Eagleville, PA - USA
Joined: 11/1/2001
Posts: 18399
Vette(s): Used to own a 1979 Corvette now owned by JB79

The DOT number indicates the boiling point of the fluid. The higher the DOT number the better quality the hydraulic fluid and the greater the ability to withstand a high temperature and performance environment.

I found this thread that already talks about this same topic.... which may help you...

https://www.c3vr.com/vrforums/c3-handling-components/brake-fluid/147121/

 




-Adam Wartell
NCM Lifetime Member #1222
Founder: C3 Vette Registry 
C4 Vette Registry, C6 Vette Registry

My first Vette, now owned by JB79:

Re: What do all the DOT's mean? (Brake Fluid)

Posted: 1/4/23 1:43pm Message 3 of 4
73shark
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Overland Park, KS - USA
Joined: 7/9/2003
Posts: 914
Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day. 2023 Accelerate Yellow HTC Stingray

Here you go.

https://blog.amsoil.com/dot-3-and-dot-4-brake-fluid-whats-the-difference/
 



1973 L-82 4 spd

Re: What do all the DOT's mean? (Brake Fluid)

Posted: 1/4/23 3:33pm Message 4 of 4
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F4Gary
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Grapevine, TX - USA
Joined: 8/26/2006
Posts: 1525
Vette(s): 1972 LT-1 convertible with factory air. 2017 Black Rose Grand Sport convertible.

I'd stay away from Dot 5.  It is silicone based and you have to completely clean/flush your whole brake system.  Not compatible with any others.

Dot 3, 4, and 5.1 are not silicone based and I believe are all compatible. No reason not to use them.




   

in Forum: C3 Driveline Components


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