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Galleries > Part 2: John Isom Photos from 1967-68 Champ Car races > STP turbine

The  #20 STP turbine-powered car with the cowling removed at the Hanford Motor Speedway on Nov. 3, 1968. Note the open jar of Vasoline sitting on the chassis on the right. Can it be that a closely guarded secret to the turbine’s incredible performance has finally been revealed? (Photo courtesy of John Isom).