Martin Truex Jr. Leads for 125 Laps En Route to NASCAR Auto Club 400 Win Martin Truex Jr. will, no matter what, be getting a chance to defend his championship. Truex turned in a dominant performance Sunday, winning from the pole to capture the Auto Club 400 in Fontana, California. The No.78 car led 125 laps in a race that Truex and Kyle Busch dominated entirely. Truex finished nearly 11 seconds ahead of second-place Kyle Larson and clinched a spot in the NASCAR playoffs. The defending NASCAR champion, Truex began his season with a series of headaches.