 Complete the following phrase:  Dollar General is also active in the IndyCar Series since 2008, serving as the primary sponsor for ownerdriver Sarah Fishers Sarah Fisher Racing team. In 2010, both Fisher and Graham Rahal drove part-time for the team finishing 9th at the Honda Grand Prix of St. Petersburg. Fisher also led the field at the Peak Antifreeze  Motor Oil Indy 300 at Chicagoland Speedway. In 2011, Dollar General continued to sponsor Sarah Fisher Racing, the team was still part-time but Ed Carpenter drove for nines races starting at the 