Series Champions
| Year | No | Driver | Primary Sponsor | Team | Chassis | Engine | Tires | Points | |
|---|---|---|---|---|---|---|---|---|---|
| 1996 | 11 | Scott Sharp (co-champion) | Conseco | A.J. Foyt Enterprises | Lola | Cosworth | Goodyear | 246 | |
| 1996 | 12 | Buzz Calkins (co-champion) | Bradley FoodMarts | Bradley Motorsports | Reynard | Cosworth | Goodyear | 246 | |
| 1996-97 | 20 | Tony Stewart | Glidden Paints/Menards | Team Menard | G-Force | Oldsmobile | Firestone | 278 | |
| 1998 | 14 | Kenny Brack | Power Team | A.J. Foyt Enterprises | Dallara | Oldsmobile | Goodyear | 332 | |
| 1999 | 2 | Greg Ray | Glidden Paints/Menards | Team Menard | Dallara | Oldsmobile | Firestone | 293 | |
| 2000 | 91 | Buddy Lazier | Coors Light/Delta Faucet/Tae-Bo | Hemelgarn Racing | Dallara Riley & Scott |
Oldsmobile | Firestone | 290 | |
| 2001 | 4 | Sam Hornish Jr. | Pennzoil | Panther Racing | Dallara | Oldsmobile | Firestone | 503 | |
| 2002 | 4 | Sam Hornish Jr. | Pennzoil | Panther Racing | Dallara | Chevrolet | Firestone | 531 | |
| 2003 | 9 | Scott Dixon | Target | Chip Ganassi Racing | G-Force | Toyota | Firestone | 507 | |
| 2004 | 11 | Tony Kanaan | 7-Eleven | Andretti Green Racing | Dallara | Honda | Firestone | 618 | |
| 2005 | 26 | Dan Wheldon | Jim Beam/Klein Tools | Andretti Green Racing | Dallara | Honda | Firestone | 618 | |
| 2006 | 6 | Sam Hornish Jr. | Marlboro | Team Penske | Dallara | Honda | Firestone | 475 | |
| 2007 | 27 | Dario Franchitti | Canadian Club/vonage | Andretti Green Racing | Dallara | Honda | Firestone | 637 | |
| 2008 | 9 | Scott Dixon | Target | Chip Ganassi Racing | Dallara | Honda | Firestone | 646 |