1987 Indianapolis 500 Al Unser, Sr. held off Roberto Guerrero by 4.496 seconds, to win his record-tying fourth Indianapolis 500 victory. By leading the final 18 laps, Unser, Sr. tied the all-time record for most laps led in Indy 500 competition, and, at 47 years of age, also became the oldest winner of the 500. Mario Andretti's dominance of the month, and subsequent failure to achieve victory, was largely unprecedented in modern times. He led the practice speed chart on 11 of the 17 days (he participated in only 13 days), won the pole position, won the pit stop contest, had the fastest
1914 Indianapolis 500 Ray Harroun, who had won the inaugural Indianapolis 500 in 1911, designed the Maxwell car, and was given $10,000 () by the company's president as a reward for the cars qualifying with sub-1:37 times. By the end of the second day, 21 drivers had completed speed trials, and all but DePalma and Eddie Pullen had times below 1:45. Hughie Hughes's car suffered a broken crank case, preventing him from being able to set a qualifying time. On the final day of the trials, DePalma managed to make significant improvements in his Mercedes, and qualified with the twentieth fastest time overall,