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Old 01-12-2008, 09:58 AM   #1
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DOT 3 VS. DOT 4 in an SVT

This Might be moved to Brakes but since Im talking about the svt and more people look on this section Im going to post in in the SVT chat...

So My dad and I are about to replace my clutch. (Finally) and we were talking about what I need to get today. One of the things I need is Brake fluid of course/// Well we started to get into a useless debate on what brake fluid to put in... He told me to go get DOT 3 instead of the recommended DOT 4.... He said the difference in Boiling Temp is only 20 to 30 degree F difference and DOT 4 costs a lot more. I told him that I am going to stick with the DOT 4 because I trust the factory spec more and because I will be running not only brakes but also Clutch off of the stuff.... He said that it wont matter unless you go on a road course or in the mountains.
Im just curious what you guys think...???
Is Running DOT 3 with the SVT brake system okay or is it not good...?
Does it make a difference in brake response?


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Old 01-12-2008, 10:00 AM   #2
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dot 4
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Old 01-12-2008, 10:04 AM   #3
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Im already going to put in DOT 4,,, I just what to know what it will do if I put DOT 3 in
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Old 01-12-2008, 12:40 PM   #4
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like your dad said .. mountains or road course and you may experience some brake fade...
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Old 01-12-2008, 01:03 PM   #5
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So No harm in Flat Places with normal Driving.. Ill Did some research and Looks Like it wont hurt... I am still putting DOT4 in though..
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Old 01-12-2008, 01:08 PM   #6
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DOT3 is perfectly fine for street driving.
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Old 01-12-2008, 01:13 PM   #7
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I used DOT3, but would probably have gone with DOT4 if it was on the shelf at the time. Either one will suit you fine for normal spirited driving.
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Old 01-12-2008, 01:40 PM   #8
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There was DOT3 in my car when I got it. Braking on the highway offered me some brake fade more often than not. I didn't like it.

That minor difference in boiling points will help, considering how big the SVT brakes are and probably that they get hotter than standard ones. I use Valvoline SynPower now and haven't had the brakes fade once.
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Old 01-13-2008, 12:31 AM   #9
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^^ probably because your old fluid was....old.

Braking produces the SAME heat regardless of brake type or size. The energy you are sucking out of the cars momentum is directly transformed into heat. Thats why big brakes are big, they spread and dissipate heat better than small brakes.
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Old 01-13-2008, 10:36 AM   #10
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Quote:
Originally Posted by DFv2 View Post
^^ probably because your old fluid was....old...
It wasn't that old when I got; 24k miles at the most.

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Originally Posted by DFv2 View Post
...Braking produces the SAME heat regardless of brake type or size. The energy you are sucking out of the cars momentum is directly transformed into heat. Thats why big brakes are big, they spread and dissipate heat better than small brakes.
I'm such a newb sometimes.

And for reference, the brake/clutch reservoir on my SVT says to use DOT 3 or better.
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