| Official Race Results | |||||||||
| STP 500 | Martinsville Speedway | |||||||||
| March 25, 2018-rain/snow delayed to March 26, 2018|Race 6 of 36 | |||||||||
| Average Speed: 81.7 M.P.H. | |||||||||
| Time of Race: 3 Hrs., 13 Mins., 14 Secs. | |||||||||
| Lead Changes: 11 among 6 drivers | |||||||||
| Cautions: 4 for 33 laps | |||||||||
| Fin | St | Car | Driver | Make | Sponsor | Pts / Bonus | Laps | Status | |
| 1 | 9 | 14 | Clint Bowyer | Ford | Haas Automation Demo Day | 55 | 500 | Running | |
| 2 | 2 | 18 | Kyle Busch | Toyota | M&M's Caramel | 50 | 500 | Running | |
| 3 | 5 | 12 | Ryan Blaney | Ford | Menards/Libman | 52 | 500 | Running | |
| 4 | 1 | 78 | Martin Truex Jr | Toyota | 5-hour ENERGY/Bass Pro Shops | 33 | 500 | Running | |
| 5 | 8 | 4 | Kevin Harvick | Ford | Jimmy John's | 42 | 500 | Running | |
| 6 | 3 | 22 | Joey Logano | Ford | Shell Pennzoil | 35 | 500 | Running | |
| 7 | 16 | 88 | Alex Bowman | Chevrolet | Nationwide | 30 | 500 | Running | |
| 8 | 25 | 47 | AJ Allmendinger | Chevrolet | Kroger ClickList | 36 | 500 | Running | |
| 9 | 21 | 9 | Chase Elliott | Chevrolet | NAPA Auto Parts | 28 | 500 | Running | |
| 10 | 4 | 2 | Brad Keselowski | Ford | Reese/DrawTite | 43 | 500 | Running | |
| 11 | 11 | 41 | Kurt Busch | Ford | Haas Automation/Monster Energy | 33 | 500 | Running | |
| 12 | 6 | 11 | Denny Hamlin | Toyota | FedEx Ground | 41 | 500 | Running | |
| 13 | 15 | 21 | Paul Menard | Ford | Motorcraft/Quick Lane Tire &… | 24 | 500 | Running | |
| 14 | 10 | 10 | Aric Almirola | Ford | Mobil 1 | 23 | 500 | Running | |
| 15 | 18 | 48 | Jimmie Johnson | Chevrolet | Lowe's for Pros | 24 | 499 | Running | |
| 16 | 7 | 42 | Kyle Larson | Chevrolet | Credit One Bank/DC Solar | 21 | 499 | Running | |
| 17 | 13 | 20 | Erik Jones | Toyota | Circle K | 20 | 497 | Running | |
| 18 | 23 | 19 | Daniel Suarez | Toyota | ARRIS | 19 | 497 | Running | |
| 19 | 14 | 31 | Ryan Newman | Chevrolet | eBay Motors | 18 | 497 | Running | |
| 20 | 20 | 24 | William Byron | Chevrolet | Liberty University | 17 | 497 | Running | |
| 21 | 24 | 34 | Michael McDowell | Ford | A&W All American Food | 16 | 497 | Running | |
| 22 | 32 | 13 | Ty Dillon | Chevrolet | GEICO | 15 | 496 | Running | |
| 23 | 22 | 37 | Chris Buescher | Chevrolet | Bush's Beans | 14 | 496 | Running | |
| 24 | 29 | 95 | Kasey Kahne | Chevrolet | WRL General Contractors | 13 | 496 | Running | |
| 25 | 28 | 38 | David Ragan | Ford | MDS Transport | 12 | 495 | Running | |
| 26 | 26 | 1 | Jamie McMurray | Chevrolet | First Data | 11 | 495 | Running | |
| 27 | 35 | 72 | Cole Whitt | Chevrolet | TriStar Motorsports | 10 | 493 | Running | |
| 28 | 37 | 96 | DJ Kennington | Toyota | Gordon Brothers | 9 | 493 | Running | |
| 29 | 33 | 15 | Ross Chastain | Chevrolet | ChampionMachinery.com | 0 | 493 | Running | |
| 30 | 12 | 3 | Austin Dillon | Chevrolet | American Ethanol | 7 | 493 | Running | |
| 31 | 38 | 55 | JJ Yeley | Chevrolet | Adirondack Tree Surgeons | 0 | 493 | Running | |
| 32 | 31 | 32 | Matt DiBenedetto | Ford | Can-Am/Wholey | 5 | 488 | Running | |
| 33 | 27 | 6 | Trevor Bayne | Ford | AdvoCare | 4 | 486 | Running | |
| 34 | 19 | 43 | Darrell Wallace Jr | Chevrolet | STP | 3 | 486 | Running | |
| 35 | 30 | 51 | Harrison Rhodes | Chevrolet | Custom Aircraft Cabinets | 2 | 482 | Running | |
| 36 | 34 | 23 | Gray Gaulding | Toyota | Earthwater | 1 | 481 | Running | |
| 37 | 17 | 17 | Ricky Stenhouse Jr | Ford | Fastenal | 1 | 481 | Running | |
| 38 | 36 | 0 | Landon Cassill | Chevrolet | USFRA.org/StarCom Fiber | 1 | 211 | Rear gear | |