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All-time Indy Car Records & MilestonesUpdated after the Indianapolis 500, May 27, 2012Margin of Victory Top 10 Closest Margins of Victory:MOV Track Date Winner Runner-up0.0024 Chicagoland 9/8/02 Sam Hornish Jr. Al Unser Jr.0.0033 Chicagoland 9/7/08 Helio Castroneves Scott Dixon0.0051 Kansas 7/4/04 Buddy Rice Vitor Meira0.0077 Chicagoland 8/29/09 Ryan Briscoe Scott Dixon0.0096 Texas 9/15/02 Sam Hornish Jr. Helio Castroneves0.0098 Kentucky 10/2/11 Ed Carpenter Dario Franchitti0.0099 Chicagoland 9/7/03 Sam Hornish Jr. Scott Dixon0.0111 Texas 6/8/02 Jeff Ward Al Unser Jr.0.0120 Kansas 7/3/05 Tony Kanaan Dan Wheldon0.0121 Michigan 7/27/03 Alex Barron Sam Hornish Jr.Lap Leaders Most laps led - all races: 7,595 – Mario Andretti Most laps led in a single race: 250 of 250 – Ryan Hunter-Reay (Milwaukee (CCWS), 6/5/2004) Most consecutive laps led in a single race: 250 – Ryan Hunter-Reay (Milwaukee (CCWS), 6/5/2004) Most laps led in a single race by the race winner: 250 of 250 – Ryan Hunter-Reay (Milwaukee(CCWS), 6/5/2004) Fewest laps led in a single race by the race winner: 1(12 times) – most recent: Dan Wheldon,Indianapolis, 5/29/2005 Most laps led in a season: 1,527 – Al Unser (1970) Most races led: 201 – Mario Andretti Most races led in a season: 17 – Al Unser (1970); Danny Ongais (1978) Most lead changes - single race: 73 (California, 11/4/01) Fewest lead changes - single race: 0 (most recent: Infineon, 8/23/09) Most leaders - single race: 72 (California, 11/4/01) Fewest leaders - single race: 1 (most recent-Barber, 4/10/11)Cautions Most cautions during a race: 14 (Indianapolis, 5/29/98) Most laps under caution during a race: 116 (Nazareth, 4/21/02) Fewest cautions during a race: 0 (most recent: Texas Race 2, 6/11/11) Fewest laps under caution during a race: 0 (most recent: Texas Race 2, 6/11/11)