| Teams 2008 O'Reilly Auto Parts 300 |
|---|
| No. | Team | Driver | Mfg |
|---|---|---|---|
| 1 | JD Motorsports | Kertus Davis | Chevrolet |
| 1 | Phoenix Racing | Mike Bliss | Chevrolet |
| 2 | Richard Childress Racing | Clint Bowyer | Chevrolet |
| 4 | Jay Robinson Racing | Robert Richardson, J | Chevrolet |
| 5 | JR Motorsports | Dale Earnhardt, Jr. | Chevrolet |
| 5 | Day Enterprise Racing | Brett Rowe | Chevrolet |
| 6 | Roush Fenway Racing | David Ragan | Ford |
| 7 | Germain Racing | Mike Wallace | Toyota |
| 9 | Gillette Evernham Motorsports | Kasey Kahne | Dodge |
| 11 | CJM Racing | Jason Keller | Chevrolet |
| 12 | Team Penske | Sam Hornish, Jr. | Dodge |
| 16 | Roush Fenway Racing | Jamie McMurray | Ford |
| 18 | Joe Gibbs Racing | Kyle Busch | Toyota |
| 20 | Joe Gibbs Racing | Tony Stewart | Toyota |
| 21 | Richard Childress Racing | Bobby Labonte | Chevrolet |
| 22 | Fitz Motorsports | Robby Gordon | Dodge |
| 24 | Front Row Motorsports | Eric McClure | Chevrolet |
| 25 | Team Rensi Motorsports | Bobby Hamilton, Jr. | Ford |
| 27 | Baker Curb Racing | Brad Coleman | Ford |
| 28 | Jay Robinson Racing | Kenny Wallace | Chevrolet |
| 29 | Richard Childress Racing | Jeff Burton | Chevrolet |
| 30 | SKI Motorsports | Stanton Barrett | Chevrolet |
| 32 | Braun Motorsports | Brian Vickers | Toyota |
| 33 | Kevin Harvick Incorporated | Kevin Harvick | Chevrolet |
| 37 | Baker Curb Racing | Burney Lamar | Ford |
| 38 | Braun Motorsports | Jason Leffler | Toyota |
| 40 | Chip Ganassi Racing | Dario Franchitti | Dodge |
| 41 | Chip Ganassi Racing | Kyle Krisiloff | Dodge |
| 47 | Frank Schwantz | Kelly Bires | Ford |
| 52 | Jimmy Means Racing | Derrike Cope | Chevrolet |
| 59 | Frank Schwantz | Marcos Ambrose | Ford |
| 60 | Roush Fenway Racing | Carl Edwards | Ford |
| 61 | Specialty Racing | Kevin Lepage | Ford |
| 64 | Rusty Wallace Racing | David Stremme | Chevrolet |
| 66 | Rusty Wallace Racing | Steve Wallace | Chevrolet |
| 70 | ML Motorsports | Mark Green | Chevrolet |
| 81 | MacDonald Motorsports | D.J. Kennington | Dodge |
| 84 | Mike Harmon Racing | Mike Harmon | Chevrolet |
| 88 | JR Motorsports | Brad Keselowski | Chevrolet |
| 89 | Shepherd Racing Ventures | Morgan Shepherd | Dodge |
| 90 | Phil Parsons Racing | Johnny Chapman | Chevrolet |
| 91 | Phil Parsons Racing | Larry Gunselman | Chevrolet |
| 99 | Michael Waltrip Racing | David Reutimann | Toyota |