| series | Champcar complete |
| race | Ontario 500 |
| year | 1978 |
| team | car | entry | driver | start | finish | chassis | engine | laps led | * | |
| Hall Racing | 2 | 1st National Travel Check | Al Unser | | 7 | 1 | Lola T500 [HU02] | Cosworth DFX | 74 | |
| Fletcher | 8 | Budweiser | Pancho Carter | | 6 | 2 | Lightning Mk1/77 [f] | Cosworth DFX | ||
| Patrick | 20 | North American Van Lines | Gordon Johncock | | 9 | 3 | Wildcat Mk.II [4] | DGS | 16 | |
| Leader Card | 22 | Kent Oil | Tom Bagley | | 13 | 4 | Watson 77 [1] | Offy Drake tc | ||
| Art Sugai | 90 | Hank's Datsun | Lee Kunzman | | 27 | 5 | Fox 78 [1] | Offy Drake tc | ||
| Beith Racing | 28 | Galles Chevy | Roger Mears | | 29 | 6 | Eagle 72 [7219] | Offy Drake tc | ||
| Patrick | 40 | Foreman Industries | Steve Krisiloff | | 14 | 7 | Wildcat Mk.II [3] | DGS | ||
| Longhorn | 18 | Longhorn Racing | Cliff Hucul | | 18 | 8 | Wildcat Mk.I [2] | DGS | ||
| Penske | 7 | Gould Charge | Rick Mears | | 4 | 9 | Penske PC-6/78 | Cosworth DFX | ||
| O'Connell | 6 | Sugaripe Prune | Wally Dallenbach | | 8 | 10 | McLaren M24 [001] | Cosworth DFX | ||
| McLaren | 4 | 1st National Travel Check | Johnny Rutherford | | 2 | 11 | McLaren M24B [001] | Cosworth DFX | 96 | |
| Interscope | 25 | Interscope | Danny Ongais | | 3 | 12 | Parnelli VPJ6C | Cosworth DFX | 7 | |
| All American Racers | 48 | ARCOgraphite | Bobby Unser | | 11 | 13 | Eagle 78 [7801] | Cosworth DFX | ||
| Vollstedt | 17 | La Machine | Dick Simon | | 16 | 14 | Vollstedt 77 [14] | Offy Drake tc | ||
| Lindsey Hopkins | 16 | 1st National Travel Check | Johnny Parsons Jr | | 10 | 15 | Lightning Mk1/77 [c] | Offy Drake tc | ||
| Morales | 78 | Alex Foods | Mike Mosley | | 15 | 16 | Lightning Mk1/77 | Offy Drake tc | ||
| Leader Card | 24 | Thermo King | Sheldon Kinser | | 20 | 17 | Watson 78 [1] | Offy Drake tc | ||
| Joe Hunt | 99 | Joe Hunt Magnetos | Bob Harkey | | 22 | 18 | Eagle 73 [7302] | Offy 159 tc | ||
| Frank Fiore | 87 | Machinists Union | Al Loquasto | | 30 | 19 | Rascar Atlanta 72 [2] | Offy Drake tc | ||
| McElreath | 26 | Circle City Coal | Jim McElreath | | 31 | 20 | Eagle 74 [7407] | Offy Drake tc | ||
| Gehlhausen | 19 | Tibon | Spike Gehlhausen | | 5 | 21 | Eagle 74 Fletcher | Offy Drake tc | ||
| Cannon Racing | 85 | Natural Lite Beer | Larry Cannon | | 23 | 22 | Wildcat Mk.I [1] | DGS | ||
| Penske | 1 | Norton Spirit | Tom Sneva | | 1 | 23 | Penske PC-6/78 [005] | Cosworth DFX | 7 | |
| Patrick | 60 | North American Van Lines | Roger McCluskey | | 28 | 24 | Wildcat Mk.IV [2] | Offy DT160 V8 | ||
| Thunder Racing | 30 | Auto Fox | Jerry Sneva | | 21 | 25 | McLaren M16C/D [B-3] | Offy Drake tc | ||
| O'Connell | 32 | Sugaripe Prune | Billy Vukovich | | 26 | 26 | Lightning Mk1/77 [e] | Cosworth DFX | ||
| AJ Foyt | 14 | Gilmore/Citicorp | George Snider | | 25 | 27 | Coyote IV [75-1] | Foyt V8 tc | ||
| AJ Foyt | 21 | American Racing Wheels | AJ Foyt | | 24 | 28 | Parnelli VPJ6CT [005] | Cosworth DFX | ||
| Dayton-Walther | 77 | Dayton-Walther | Salt Walther | | 12 | 29 | McLaren M24 [002] | Cosworth DFX | ||
| Phil Threshie | 47 | Machinists Union | Phil Threshie | | 17 | 30 | Lightning Mk1/76 [1] | Offy Drake tc | ||
| William R Compton | 38 | Bentzel Construction | Jerry Karl | | 19 | 31 | McLaren M16C/D [C/D-6] | Offy Drake tc | ||
| O'Connell | 6 | Sugaripe Prune | Billy Vukovich | | DNS | Lightning Mk1/77 [e] | Cosworth DFX |
