Keselowski hails impetus of Ford swap

Brad Keselowski believes Penske's switch to Ford will provide a much-needed boost to motivation levels following his 2012 NASCAR Sprint Cup title success. The 28-year-old became Penske's first Cup champion in the final round of the season at Homestead, triumphing after nearest rival Jimmie Johnson hit trouble. Speaking during Tuesday's test at Charlotte Motor Speedway, where Penske has started its transition from Dodge to Ford , he admitted it would be easy for energy and drive to slip in the wake of the team's triumph.

Kerry Dale Earnhardt