SONOMA, Calif. (AP) - With a dominating drive on a day worth double points, Scott Dixon once again proved he is one of the greatest IndyCar drivers in open-wheel history.Dixon overcame long odds to grab his fourth championship by winning the season finale at Sonoma Raceway. The victory pulled him from third in the standings into a tie with Juan Pablo Montoya, with the title going to Dixon on a tie-breaker.