I'm about to flush out my brake fluid on my 05 mustang. The fluid is black in color and have never changed it only bleed it before. I have notice my mustang doesn't stop as good as my accord does over time.The setup on my mustang is gt500 brembo calipers, Hawk hps pads, powerslot rotors. Rear stock calipers , hawk hps , powerslot rotors. I'm going to flush my brake fluid but don't know which one to use. I'm thinking of ATE , valvoline or stick with ford motorcraft. My mustang is only a street driven. Any suggestions?