Which Formula One world champion won the 1966 Indianapolis 500?

Graham Hill, a two-time Formula One World Drivers’ Champion, won the 1966 Indianapolis 500. He drove a Lola-Ford for Mecom Racing and took victory after leading the final 10 laps.

Hill inherited the lead when Jackie Stewart, who had dominated much of the second half, stopped with low oil pressure and retired. Hill finished ahead of Jim Clark, another future Formula One World Champion. The official margin was about 41 seconds, although the race became famous for confusion over the scoring order.

Clark’s Lotus team believed he had completed enough laps to win, and the manually operated scoring pylon changed repeatedly during the event. USAC’s official results the next morning still listed Hill as the winner, and Clark’s team did not file a formal protest. Independent scoring by the IMS Radio Network also placed Hill first.

Hill’s victory was his only Indianapolis 500 win. Combined with his Formula One titles, five Monaco Grand Prix victories, and 1972 Le Mans triumph, it helped make him the only driver to complete motorsport’s traditional Triple Crown.