It wasn't until 1975 that Andretti drove a full Formula One season, for the American Parnelli team. The team was new to Formula One, although it had been successful in both Formula 5000 and IndyCar racing in America with Andretti driving. The team had run Andretti in the two North American end-of-season races in 1974 with promising results. Andretti qualified fourth and led the 1975 Spanish Grand Prix for nine laps before his suspension failed. He scored five championship points in the season. Andretti continued to compete in IndyCar, missing two Formula One races in the middle of the season to do so.