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 Fred Frame. At the time, it was the second-closest margin of victory in Indianapolis 500 history. Polesitter Russ Snowberger was one of three drivers in the top five to complete the race without relief help. The car of Myron Stevens, with Louis Meyer driving relief for most of the race, charged from 35th starting position to 4th place, a remarkable gain of 31 positions at the finish. 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