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Old 12-22-2001, 12:03 PM
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DOT 4 or DOT 3 ?

I noticed DOT4 brake fluid on the shelves. What are the differences between it and DOT 3 ?
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Old 12-23-2001, 08:07 AM
Michael's Avatar
Join Date: Jul 1999
Location: CT, USA
Posts: 2,699
I think it's primarily their heat-handling capabilities. The DOT4 will have both a higher wet and dry boiling point. They are compatable, whereas a DOT5 is silicone-based and is another animal altogether.
"If everything seems under control, you're simply not going fast enough" --Mario Andretti

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