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A look at the drivers with the top speeds over 10 consecutive laps during practice for Sunday’s Pennzoil 400 presented by Jiffy Lube (3:30 p.m. ET, FOX, PRN, SiriusXM) at Las Vegas Motor Speedway. (Note: No drivers ran 10 consecutive laps in Friday’s first practice)
FINAL PRACTICE: Results
| Pos | Car | Driver | From Lap | To Lap | Avg Speed |
| 1 | 42 | Kyle Larson | 1 | 10 | 183.935 |
| 2 | 4 | Kevin Harvick | 1 | 10 | 183.881 |
| 3 | 78 | Martin Truex Jr. | 1 | 10 | 183.623 |
| 4 | 2 | Brad Keselowski | 1 | 10 | 183.499 |
| 5 | 9 | Chase Elliott | 1 | 10 | 183.256 |
| 6 | 18 | Kyle Busch | 1 | 10 | 183.222 |
| 7 | 10 | Aric Almirola | 1 | 10 | 183.167 |
| 8 | 20 | Erik Jones | 1 | 10 | 183.076 |
| 9 | 11 | Denny Hamlin | 1 | 10 | 183.025 |
| 10 | 14 | Clint Bowyer | 1 | 10 | 182.889 |
| 11 | 31 | Ryan Newman | 1 | 10 | 182.622 |
| 12 | 21 | Paul Menard | 1 | 10 | 182.177 |
| 13 | 1 | Jamie McMurray | 1 | 10 | 182.101 |
| 14 | 22 | Joey Logano | 23 | 32 | 182.073 |
| 15 | 48 | Jimmie Johnson | 14 | 23 | 182.050 |
| 16 | 51 | Cole Custer (i) | 1 | 10 | 181.944 |
| 17 | 41 | Kurt Busch | 17 | 26 | 181.895 |
| 18 | 43 | Darrell Wallace Jr. # | 1 | 10 | 181.679 |
| 19 | 24 | William Byron # | 21 | 30 | 181.635 |
| 20 | 12 | Ryan Blaney | 20 | 29 | 181.555 |
| 21 | 19 | Daniel Suarez | 19 | 28 | 181.409 |
| 22 | 34 | Michael McDowell | 20 | 29 | 181.059 |
| 23 | 38 | David Ragan | 1 | 10 | 180.238 |
| 24 | 6 | Trevor Bayne | 17 | 26 | 180.128 |
| 25 | 95 | Kasey Kahne | 24 | 33 | 179.789 |
| 26 | 13 | Ty Dillon | 27 | 36 | 179.259 |
| 27 | 47 | AJ Allmendinger | 15 | 24 | 179.139 |
| 28 | 3 | Austin Dillon | 15 | 24 | 178.698 |
Car must run 10 consecutive laps on the track to be included in the above chart.
# Indicates driver is running for Sunoco Rookie of the Year honors; (i) Indicates ineligible for driver points in this series
PRACTICE 2: Results
| Pos | Car | Driver | From Lap | To Lap | Avg Speed |
| 1 | 4 | Kevin Harvick | 1 | 10 | 184.663 |
| 2 | 48 | Jimmie Johnson | 1 | 10 | 183.783 |
| 3 | 78 | Martin Truex Jr. | 1 | 10 | 183.672 |
| 4 | 2 | Brad Keselowski | 13 | 22 | 183.567 |
| 5 | 18 | Kyle Busch | 11 | 20 | 183.352 |
| 6 | 20 | Erik Jones | 1 | 10 | 183.094 |
| 7 | 13 | Ty Dillon | 1 | 10 | 183.018 |
| 8 | 14 | Clint Bowyer | 16 | 25 | 182.903 |
| 9 | 22 | Joey Logano | 1 | 10 | 182.829 |
| 10 | 17 | Ricky Stenhouse Jr. | 14 | 23 | 182.394 |
| 11 | 21 | Paul Menard | 21 | 30 | 182.198 |
| 12 | 31 | Ryan Newman | 19 | 28 | 182.145 |
| 13 | 1 | Jamie McMurray | 19 | 28 | 181.870 |
| 14 | 24 | William Byron # | 16 | 25 | 181.558 |
| 15 | 19 | Daniel Suarez | 20 | 29 | 181.223 |
| 16 | 34 | Michael McDowell | 13 | 22 | 181.053 |
| 17 | 95 | Kasey Kahne | 18 | 27 | 180.795 |
| 18 | 38 | David Ragan | 22 | 31 | 180.651 |
| 19 | 88 | Alex Bowman | 22 | 31 | 179.675 |
Car must run 10 consecutive laps on the track to be included in the above chart.
# Indicates driver is running for Sunoco Rookie of the Year honors.