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
1931 Indianapolis 500 1931 Indianapolis 500 The 19th International 500-Mile Sweepstakes Race was held at the Indianapolis Motor Speedway on Saturday, May 30, 1931. Race winner Louis Schneider, who led the final 34 laps, was accompanied by riding mechanic Jigger Johnson. The start of the race was delayed two hours due to rain. Defending race winner Billy Arnold charged from 18th starting position to lead the race by lap 7. Arnold, who had dominated the 1930 race (led 198 laps), proceeded to lead the next 155 laps, and built up a five-lap lead over second place. His rear axle broke on lap 162.