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Old 12-23-2001, 08:07 AM
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Michael Michael is offline
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

1995 E500 street car
1986 Porsche 944 Turbo S track car
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