The stress of racing year round and on several continents eventually caused medical problems for Stewart. He won the 1971 world championship despite suffering from mononucleosis and crossing the Atlantic Ocean 186 times due to media commitments in the United States. During the 1972 Grand Prix season he missed the Belgian Grand Prix at Nivelles due to gastritis, and had to cancel plans to drive a Can-Am McLaren, but won the Argentine, French, U.S. and Canadian Grands Prix, to come second to Emerson Fittipaldi in the drivers' standings. Stewart also competed in a Ford Capri RS2600 in the European Touring Car Championship, with F1 teammate François Cevert and other F1 pilots, at a time where the competition between Ford and BMW was at a height. Their best result was at the 6 Hours of Paul Ricard, finishing second. In 1972 Stewart also received the OBE.