The Corvette ships with DOT 3 and that is perfectly fine for everyday use and light track duty. Moderate track duty and performance driving would suggest DOT 4. DOT 4 is fine and completely compatible with the C6 brake system. DOT 4 simply has a higher temperature capability. Do not use DOT 5 under any circumstances, it is silicone based and not compatible with the Corvette ABS system. You can use DOT 5.1.
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