| 6.1.2008 | Daytona Test | 01 | Mk XI | Pruett / Rojas / Franchitti / Montoya | TELMEX Chip Ganassi with Felix Sabates | 1st |
| 6.1.2008 | Daytona Test | 02 | Mk XI | Dixon / Wheldon / Duran / Lloyd | Target Chip Ganassi with Felix Sabates | 6th |
| 6.1.2008 | Daytona Test | 2 | Mk XI | Zogaib / McNish / Luhr / Rockenfeller | SAMAX | 10th |
| 6.1.2008 | Daytona Test | 3 | Mk XI | Shane Lewis | Southard Motorsports | 20th |
| 6.1.2008 | Daytona Test | 6 | Mk XX | Pew / James / Allmendinger / Frisselle | Michael Shank Racing | 3rd |
| 6.1.2008 | Daytona Test | 7 | Mk XI | Plumb / Wahl / Grégoire / Cullen / Shovlin | Fortune Market Racing | 15th |
| 6.1.2008 | Daytona Test | 9 | Mk XI | Briscoe / Castroneves / Busch | Penske-Taylor Racing | 2nd |
| 6.1.2008 | Daytona Test | 10 | Mk XI | Taylor / Angelelli / Valiante / Taylor | SunTrust Racing | 7th |
| 6.1.2008 | Daytona Test | 11 | Mk XI | Duno / Primat / Mücke / Enge / Charouz / Dalziel | SAMAX | 9th |
| 6.1.2008 | Daytona Test | 12 | Mk XI | Schramm / Bell / Bell / Dallenbach / Kasemets | RVO Motorsports | 19th |
| 6.1.2008 | Daytona Test | 58 | Mk XI | Donohue / Law / Rice | Brumos Porsche | 11th |
| 6.1.2008 | Daytona Test | 59 | Mk XI | France / Haywood / Barbosa / Borcheller | Brumos Porsche/Kendall | 12th |
| 6.1.2008 | Daytona Test | 60 | Mk XX | Patterson / Negri / Wilson / Rahal | Michael Shank Racing | 8th |
| 6.1.2008 | Daytona Test | 61 | Mk XX | Frisselle / Wilkins / Ranger / Braun | AIM Autosport | 4th |
| 6.1.2008 | Daytona Test | 91 | Mk XX | Matthews / Goossens / Hunter-Reay / O'Connell | Bob Stallings/Riley-Matthews | 13th |
| 6.1.2008 | Daytona Test | 99 | Mk XI | Johnson / Gurney / Fogarty / Vasser | Gainsco/Bob Stallings Racing | 5th |
| 27.1.2008 | 24 h Daytona | 01 | Mk XI | Pruett / Rojas / Montoya / Franchitti | Chip Ganassi with Felix Sabates | 1st |
| 27.1.2008 | 24 h Daytona | 02 | Mk XI | Dixon / Wheldon / Duran / Lloyd | Chip Ganassi with Felix Sabates | 44th |
| 27.1.2008 | 24 h Daytona | 2 | Mk XI | Rockenfeller / McNish / Luhr | SAMAX | 55th |
| 27.1.2008 | 24 h Daytona | 3 | Mk XI | Lewis / Lester / Christopher / Barron | Southard Motorsports | 42nd |
| 27.1.2008 | 24 h Daytona | 6 | Mk XX | Pew / James / Allmendinger / Frisselle | Michael Shank Racing | 14th |
| 27.1.2008 | 24 h Daytona | 7 | Mk XI | Plumb / Wahl / Grégoire / Cullen / Shovlin | Sigalsport | 28th |
| 27.1.2008 | 24 h Daytona | 9 | Mk XI | Briscoe / Castroneves / Busch | Penske-Taylor Racing | 3rd |
| 27.1.2008 | 24 h Daytona | 10 | Mk XI | Taylor / Angelelli / Valiante / Taylor | SunTrust Racing | 5th |
| 27.1.2008 | 24 h Daytona | 11 | Mk XI | Dalziel / Enge / Primat | SAMAX | 61st |
| 27.1.2008 | 24 h Daytona | 12 | Mk XI | Bell / Kasemets | RVO Motorsports | 63rd |
| 27.1.2008 | 24 h Daytona | 58 | Mk XI | Law / Donohue / Rice | Brumos Racing | 27th |
| 27.1.2008 | 24 h Daytona | 59 | Mk XI | France / Barbosa / Borcheller / Haywood | Brumos Racing | 23rd |
| 27.1.2008 | 24 h Daytona | 60 | Mk XX | Patterson / Negri / Wilson / Rahal | Michael Shank Racing | 6th |
| 27.1.2008 | 24 h Daytona | 61 | Mk XX | Frisselle / Wilkins / Ranger / Braun | AIM Autosport | 48th |
| 27.1.2008 | 24 h Daytona | 75 | Mk XI | Krohn / van de Poele / Gavin | Krohn Racing | 7th |
| 27.1.2008 | 24 h Daytona | 76 | Mk XI | Jönsson / Zonta / Turner | Krohn Racing | 4th |
| 27.1.2008 | 24 h Daytona | 91 | Mk XX | Matthews / Goossens / O'Connell / Hunter-Reay | Bob Stallings/Riley-Matthews | 8th |
| 27.1.2008 | 24 h Daytona | 99 | Mk XI | Gurney / Fogarty / Vasser / Johnson | Gainsco/Bob Stallings Racing | 2nd |
| 29.3.2008 | 250 miles Homestead | 01 | Mk XX | Pruett / Rojas | Chip Ganassi with Felix Sabates | 1st |
| 29.3.2008 | 250 miles Homestead | 2 | Mk XI | Zogaib / Dalziel | SAMAX | 20th |
| 29.3.2008 | 250 miles Homestead | 3 | Mk XX | Lewis / Lester | Southard Motorsports | 9th |
| 29.3.2008 | 250 miles Homestead | 6 | Mk XX | Pew / James | Michael Shank Racing | 36th |
| 29.3.2008 | 250 miles Homestead | 7 | Mk XI | Plumb / Sigal | Sigalsport | 5th |
| 29.3.2008 | 250 miles Homestead | 9 | Mk XI | Smith / Tuttle | Tuttle Team Racing | 39th |
| 29.3.2008 | 250 miles Homestead | 12 | Mk XI | Bell / Schramm | RVO Motorsports | DNA |
| 29.3.2008 | 250 miles Homestead | 58 | Mk XI | Law / Donohue | Brumos Racing | 42nd |
| 29.3.2008 | 250 miles Homestead | 59 | Mk XI | France / Barbosa | Brumos Racing | 7th |
| 29.3.2008 | 250 miles Homestead | 60 | Mk XX | Patterson / Negri | Michael Shank Racing | 3rd |
| 29.3.2008 | 250 miles Homestead | 61 | Mk XX | Frisselle / Wilkins | AIM Autosport | 8th |
| 29.3.2008 | 250 miles Homestead | 91 | Mk XX | Matthews / Goossens | Bob Stallings/ Riley-Matthews | 4th |
| 29.3.2008 | 250 miles Homestead | 99 | Mk XX | Gurney / Fogarty | Bob Stallings/Riley-Matthews | 6th |
| 19.4.2008 | 250 miles Mexico | 01 | Mk XX | Pruett / Rojas | Chip Ganassi Racing with Felix Sabates | 2nd |
| 19.4.2008 | 250 miles Mexico | 2 | Mk XI | Zogaib / Dalziel | SAMAX | 28th |
| 19.4.2008 | 250 miles Mexico | 3 | Mk XX | Lewis / Lester | Southard Motorsports | 12th |
| 19.4.2008 | 250 miles Mexico | 6 | Mk XX | Pew / James | Michael Shank Racing | 6th |
| 19.4.2008 | 250 miles Mexico | 7 | Mk XI | Plumb / Sigal | Sigalsport | 30th |
| 19.4.2008 | 250 miles Mexico | 58 | Mk XI | Law / Donohue | Brumos Racing | 11th |
| 19.4.2008 | 250 miles Mexico | 59 | Mk XI | France / Barbosa | Brumos Racing | 8th |
| 19.4.2008 | 250 miles Mexico | 60 | Mk XX | Patterson / Negri | Michael Shank Racing | 5th |
| 19.4.2008 | 250 miles Mexico | 61 | Mk XX | Frisselle / Wilkins | AIM Autosport | 24th |
| 19.4.2008 | 250 miles Mexico | 91 | Mk XX | Matthews / Goossens | Bob Stallings/ Riley-Matthews | 1st |
| 19.4.2008 | 250 miles Mexico | 99 | Mk XX | Gurney / Fogarty | Gainsco/Bob Stallings Racing | 4th |
| 27.4.2008 | 250 miles Virginia | 2 | Mk XI | Zogaib / Dalziel | SAMAX | 2nd |
| 27.4.2008 | 250 miles Virginia | 3 | Mk XX | Lewis / Lester | Southard Motorsports | 10th |
| 27.4.2008 | 250 miles Virginia | 6 | Mk XX | Pew / James | Michael Shank Racing | 4th |
| 27.4.2008 | 250 miles Virginia | 7 | Mk XI | Plumb / Sigal | Sigalsport | 5th |