Racing resumed on lap 146 with Vickers leading Kyle Busch, Earnhardt, Yeley and Stewart as daylight began to fade. Mears was afflicted with an alternator issue on lap 149, and switched to a back-up battery. A flat tire slowed Earnhardt on lap 154; he pitted for new tires two laps later. Ragan moved back into the top five by lap 160. Ten laps later, debris was spotted in the turn two groove, causing the sixth caution, during which all the leaders made pit stops. Vickers led on the lap-174 restart, followed by Kurt Busch and Martin. Kurt Busch drove left to pass Vickers for the lead on lap 175; three laps later, Newman drove to his garage to retire with an engine failure. Mears' team installed a new battery into his car, and switched between his main and back-up battery to ensure engine power was maintained. Vickers retook the lead from Kurt Busch on the 181st lap, and Stewart got ahead of Kyle Busch one lap later. Johnson took the lead from Vickers on lap 184.