1975 Spanish Grand Prix
It was the 21st Spanish Grand Prix since the race was first held in 1913. It was the fourth, and last, Grand Prix to be held on the Montjuïc street circuit. The race was shortened to 29 of its scheduled 75 laps, a race distance of 109 kilometres. The race was won by German driver Jochen Mass driving a McLaren M23. It would be the only Formula One win of his career. Mass had just a second lead over the Lotus 72E of Belgian driver Jacky Ickx when the race was declared. Argentine racer Carlos Reutemann was declared third in his Brabham BT44B, a lap behind the race leaders after a penalty was given to Jean-Pierre Jarier. This was the final win by a German driver until Michael Schumacher won the 1992 Belgian Grand Prix.
Penske PC1
The first race of 1975 was the 1975 Argentine Grand Prix and Donohue finished seventh. Donohue retired from the Brazilian Grand Prix because of a handling issue. The South African Grand Prix saw Donohue finish eighth. Donohue retired from the Spanish Grand Prix when he and Alan Jones (Hesketh) crashed after hitting oil dropped onto the circuit by the car of Jody Scheckter (Tyrrell). The Monaco Grand Prix saw Donohue abandon the race after he had an accident. Donohue finished 11th at Belgium. The Swedish Grand Prix saw Donohue finish fifth. The American finished eighth at Holland. The French Grand Prix saw Donohue retire from the race due to transmission failure.