Yes, different brands of the same DOT rating (for example, DOT 4 with DOT 4) are generally fine together because they share the same glycol base chemistry and standards. It is still best practice to use fresh fluid from a sealed container, not fluid that has been open and absorbing moisture for a long time.
If you have questions about brake maintenance, talk to our service advisors or see our Brake Repair in Ann Arbor page for details about our brake repair services.