STP jumping back into racing: On Wednesday afternoon, STP will announce its return to big league racing, an aggressive sponsorship plan that will have the old familiar "racer's edge" mantra back in NASCAR's Sprint Cup and Nationwide Series as well as the NHRA, plus multiple racetrack sponsorships. It begins with NASCAR's split weekend of June 4-5, when the Saturday night Nationwide Series event at Chicagoland Speedway will be the STP 300 and the following Sunday afternoon's Sprint Cup race will be the STP 400. That same weekend, Richard Petty's famous #43 car, driven by A.J. Allmendinger, will carry The King's iconic 1972 STP paint scheme, marking the first time that car has carried those colors since a two-race deal in 2006. In addition, STP has signed track sponsorship deals with International Speedway Corp. properties, including Daytona, Talladega, Richmond, Darlington, Michigan, Chicagoland and Kansas. The company has also inked a multiyear sponsorship of Infineon Raceway, including title sponsorship of its Wednesday night drag racing series.