The 1998 CART PPG/Dayton Indy Lights Championship consisted of 14 races. Future 2002 CART champion and Formula One driver Cristiano da Matta captured four wins on his way to the championship.
The following drivers and teams competed in the series:
| Rd. | Date | Track | Location | |
|---|---|---|---|---|
| 1 | March 15 | Homestead-Miami Speedway | Homestead, Florida | |
| 2 | April 5 | Long Beach Street Circuit | Long Beach, California | |
| 3 | April 27 | Nazareth Speedway | Nazareth, Pennsylvania | |
| 4 | May 23 | Gateway International Raceway | Madison, Illinois | |
| 5 | May 31 | Milwaukee Mile | West Allis, Wisconsin | |
| 6 | June 7 | The Raceway at Belle Isle Park | Detroit, Michigan | |
| 7 | June 21 | Portland International Raceway | Portland, Oregon | |
| 8 | July 12 | Cleveland Burke Lakefront Airport | Cleveland, Ohio | |
| 9 | July 19 | Exhibition Place | Toronto, Ontario | |
| 10 | July 25 | Michigan International Speedway | Brooklyn, Michigan | |
| 11 | August 2 | Circuit Trois-Rivières | Trois-Rivières, Quebec | |
| 12 | September 6 | Streets of Vancouver | Vancouver, British Columbia | |
| 13 | September 13 | Laguna Seca Raceway | Monterey, California | |
| 14 | October 31 | California Speedway | Fontana, California |
| Top Five Finishers | ||||||||
|---|---|---|---|---|---|---|---|---|
| Fin. Pos | St. Pos | Car No. | Driver | Team | Laps | Time | Laps Led | Points |
| 1 | 2 | 16 |  Shigeaki Hattori | Indy Regency Racing | 67 | 52:35.077 | 64 | 21 |
| 2 | 4 | 2 |  Cristiano da Matta | Tasman Motorsports | 67 | +0.468 | 0 | 16 |
| 3 | 7 | 6 |  Guy Smith | Johansson Motorsports | 67 | +1.420 | 0 | 14 |
| 4 | 6 | 32 |  Oriol Servià | Dorricott Racing | 67 | +5.534 | 0 | 12 |
| 5 | 9 | 78 |  Chris Simmons | Mattco Raceworks | 67 | +6.853 | 0 | 10 |
| align=center colspan=9 | Race average speed: 114.825mi/h | |||||||
| align=center colspan=9 | Lead changes: 1 between 2 drivers | |||||||
| align=center colspan=9 | Cautions: 3 for 21 laps | |||||||
| Top Five Finishers | ||||||||
|---|---|---|---|---|---|---|---|---|
| Fin. Pos | St. Pos | Car No. | Driver | Team | Laps | Time | Laps Led | Points |
| 1 | 2 | 2 | Cristiano da Matta | Tasman Motorsports | 47 | 49:20.748 | 47 | 21 |
| 2 | 4 | 14 | Geoff Boss | Lucas Place Motorsports | 47 | +0.459 | 0 | 16 |
| 3 | 6 | 27 | Naoki Hattori | Team KOOL Green | 47 | +1.083 | 0 | 14 |
| 4 | 5 | 31 |  Philipp Peter | Dorricott Racing | 47 | +3.378 | 0 | 12 |
| 5 | 1 | 18 |  Didier André | PacWest Lights | 47 | +7.317 | 0 | 11 |
| align=center colspan=9 | Race average speed: 89.951mi/h | |||||||
| align=center colspan=9 | Lead changes: none | |||||||
| align=center colspan=9 | Cautions: 2 for 6 laps | |||||||
| Top Five Finishers | ||||||||
|---|---|---|---|---|---|---|---|---|
| Fin. Pos | St. Pos | Car No. | Driver | Team | Laps | Time | Laps Led | Points |
| 1 | 1 | 2 | Cristiano da Matta | Tasman Motorsports | 100 | 55:56.268 | 100 | 22 |
| 2 | 9 | 18 | Didier André | PacWest Lights | 100 | +14.174 | 0 | 16 |
| 3 | 8 | 9 | Casey Mears | Mears Racing Team | 100 | +14.745 | 0 | 14 |
| 4 | 5 | 15 | Brian Cunningham | Lucas Place Motorsports | 100 | +17.914 | 0 | 12 |
| 5 | 11 | 1 | Airton Daré | Tasman Motorsports | 100 | +18.725 | 0 | 10 |
| align=center colspan=9 | Race average speed: 101.47mi/h | |||||||
| align=center colspan=9 | Lead changes: none | |||||||
| align=center colspan=9 | Cautions: 2 for 30 laps | |||||||
Held May 23 at Gateway International Raceway. Jorge Goeters won the pole. No qualifying held due to rain. The line up was based on combined practice times.
Top Five Results
Held May 31 at The Milwaukee Mile. Sérgio Paese won the pole.
Top Five Results
Held June 7 at Belle Isle Raceway. Airton Daré won the pole.
Top Five Results
Held June 21 at Portland International Raceway. Guy Smith won the pole.
Top Five Results
Held July 12 at Burke Lakefront Airport. Luiz Garcia Jr. won the pole.
Top Five Results
Held July 19 at Exhibition Place. Guy Smith won the pole.
Top Five Results
Held July 25 at Michigan International Speedway. Tony Renna won the pole.
Top Five Results
Held August 2 at the Trois-Rivières, Quebec Street Circuit. Cristiano da Matta won the pole.
Top Five Results
Held September 6 at Pacific Place. Cristiano da Matta won the pole.
Top Five Results
Held September 13 at Mazda Raceway Laguna Seca. Didier André won the pole.
Top Five Results
Held October 31 at The California Speedway. Tony Renna won the pole.
Top Five Results
| Position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | 11th | 12th |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Points | 20 | 16 | 14 | 12 | 10 | 8 | 6 | 5 | 4 | 3 | 2 | 1 |
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