Greg Biffle's lap of 28.507s (189.427mph) was the fastest of any of the
NASCAR Sprint Cup Series drivers participating in practice at the Los Vegas Motor Speedway on Thursday.
The practice session was a significant one as as it's the first time that the new Genertion-6 cars have run at a 1.5-mile intermediate track since their introduction at the start of 2013.
Matt Kenseth topped the earlier session of the day with a time of 28.816s (187.396mph).
Practice 11.
#20 Matt Kenseth Toyota
28.816s (Leader) 187.396mph (45 laps)
3.
#29 Kevin Harvick Chevrolet
28.824s (-0.008s) 187.344mph (58 laps)
4.
#56 Martin Truex Jr. Toyota
28.844s (-0.028s) 187.214mph (44 laps)
5.
#88 Dale Earnhardt Jr. Chevrolet
28.905s (-0.089s) 186.819mph (46 laps)
6.
#15 Clint Bowyer Toyota
28.935s (-0.119s) 186.625mph (38 laps)
7.
#42 Juan Pablo Montoya Chevrolet
28.965s (-0.149s) 186.432mph (34 laps)
8.
#55 Mark Martin Toyota
28.990s (-0.174s) 186.271mph (40 laps)
9.
#18 Kyle Busch Toyota
28.999s (-0.183s) 186.213mph (62 laps)
10.
#11 Denny Hamlin Toyota
29.000s (-0.184s) 186.207mph (37 laps)
11.
#48 Jimmie Johnson Chevrolet
29.035s (-0.219s) 185.982mph (46 laps)
12.
#2 Brad Keselowski Ford
29.085s (-0.269s) 185.663mph (36 laps)
13.
#51 Austin Dillon Chevrolet
29.122s (-0.306s) 185.427mph (48 laps)
14.
#27 Paul Menard Chevrolet
29.129s (-0.313s) 185.382mph (59 laps)
15.
#16 Greg Biffle Ford
29.138s (-0.322s) 185.325mph (46 laps)
16.
#43 Aric Almirola Ford
29.218s (-0.402s) 184.818mph (50 laps)
17.
#14 Tony Stewart Chevrolet
29.223s (-0.407s) 184.786mph (38 laps)
18.
#5 Kasey Kahne Chevrolet
29.271s (-0.455s) 184.483mph (45 laps)
19.
#31 Jeff Burton Chevrolet
29.271s (-0.455s) 184.483mph (45 laps)
20.
#19 Mike Bliss Toyota
29.276s (-0.460s) 184.451mph (7 laps)
21.
#78 Kurt Busch Chevrolet
29.283s (-0.467s) 184.407mph (38 laps)
22.
#24 Jeff Gordon Chevrolet
29.287s (-0.471s) 184.382mph (25 laps)
23.
#17 Ricky Stenhouse Jr. Ford
29.321s (-0.505s) 184.168mph (45 laps)
24.
#22 Joey Logano Ford
29.339s (-0.523s) 184.055mph (46 laps)
25.
#9 Marcos Ambrose Ford
29.351s (-0.535s) 183.980mph (47 laps)
26.
#13 Casey Mears Ford
29.411s (-0.595s) 183.605mph (82 laps)
27.
#1 Jamie McMurray Chevrolet
29.426s (-0.610s) 183.511mph (42 laps)
28.
#39 Ryan Newman Chevrolet
29.447s (-0.631s) 183.380mph (28 laps)
29.
#47 Bobby Labonte Toyota
29.473s (-0.657s) 183.219mph (19 laps)
30.
#21 Trevor Bayne Ford
29.477s (-0.661s) 183.194mph (48 laps)
31.
#10 Danica Patrick Chevrolet
29.520s (-0.704s) 182.927mph (46 laps)
32.
#34 David Ragan Ford
29.613s (-0.797s) 182.352mph (29 laps)
33.
#38 David Gilliland Ford
29.646s (-0.830s) 182.149mph (15 laps)
34.
#87 Joe Nemechek Toyota
29.715s (-0.899s) 181.726mph (9 laps)
35.
#95 Scott Speed Ford
29.718s (-0.902s) 181.708mph (15 laps)
36.
#35 Josh Wise Ford
29.746s (-0.930s) 181.537mph (10 laps)
37.
#93 Travis Kvapil Toyota
29.782s (-0.966s) 181.318mph (25 laps)
38.
#7 Dave Blaney Chevrolet
29.784s (-0.968s) 181.305mph (21 laps)
39.
#30 David Stremme Toyota
29.822s (-1.006s) 181.074mph (29 laps)
40.
#33 Landon Cassill Chevrolet
29.967s (-1.151s) 180.198mph (9 laps)
41.
#32 Ken Schrader Ford
30.023s (-1.207s) 179.862mph (17 laps)
42.
#83 David Reutimann Toyota
30.055s (-1.239s) 179.671mph (16 laps)
Practice 21.
#16 Greg Biffle Ford
28.507s (Leader) 189.427mph (61 laps)
3.
#55 Mark Martin Toyota
28.550s (-0.043s) 189.142mph (50 laps)
4.
#99 Carl Edwards Ford
28.556s (-0.049s) 189.102mph (35 laps)
5.
#29 Kevin Harvick Chevrolet
28.564s (-0.057s) 189.049mph (36 laps)
6.
#17 Ricky Stenhouse Jr. Ford
28.602s (-0.095s) 188.798mph (41 laps)
7.
#56 Martin Truex Jr. Toyota
28.625s (-0.118s) 188.646mph (27 laps)
8.
#78 Kurt Busch Chevrolet
28.625s (-0.118s) 188.646mph (55 laps)
9.
#43 Aric Almirola Ford
28.637s (-0.130s) 188.567mph (51 laps)
10.
#42 Juan Pablo Montoya Chevrolet
28.659s (-0.152s) 188.422mph (35 laps)
11.
#15 Clint Bowyer Toyota
28.714s (-0.207s) 188.062mph (27 laps)
12.
#31 Jeff Burton Chevrolet
28.753s (-0.246s) 187.806mph (48 laps)
13.
#51 Austin Dillon Chevrolet
28.787s (-0.280s) 187.585mph (19 laps)
14.
#21 Trevor Bayne Ford
28.795s (-0.288s) 187.533mph (42 laps)
15.
#22 Joey Logano Ford
28.845s (-0.338s) 187.207mph (49 laps)
16.
#9 Marcos Ambrose Ford
28.851s (-0.344s) 187.169mph (31 laps)
17.
#27 Paul Menard Chevrolet
28.887s (-0.380s) 186.935mph (46 laps)
18.
#13 Casey Mears Ford
28.905s (-0.398s) 186.819mph (49 laps)
19.
#10 Danica Patrick Chevrolet
28.907s (-0.400s) 186.806mph (19 laps)
20.
#18 Kyle Busch Toyota
29.010s (-0.503s) 186.143mph (69 laps)
21.
#88 Dale Earnhardt Jr. Chevrolet
29.019s (-0.512s) 186.085mph (74 laps)
22.
#34 David Ragan Ford
29.125s (-0.618s) 185.408mph (30 laps)
23.
#5 Kasey Kahne Chevrolet
29.141s (-0.634s) 185.306mph (59 laps)
24.
#95 Scott Speed Ford
29.180s (-0.673s) 185.058mph (9 laps)
25.
#11 Denny Hamlin Toyota
29.209s (-0.702s) 184.875mph (62 laps)
26.
#14 Tony Stewart Chevrolet
29.219s (-0.712s) 184.811mph (41 laps)
27.
#2 Brad Keselowski Ford
29.235s (-0.728s) 184.710mph (79 laps)
28.
#20 Matt Kenseth Toyota
29.250s (-0.743s) 184.615mph (54 laps)
29.
#19 Mike Bliss Toyota
29.295s (-0.788s) 184.332mph (17 laps)
30.
#1 Jamie McMurray Chevrolet
29.298s (-0.791s) 184.313mph (56 laps)
31.
#24 Jeff Gordon Chevrolet
29.305s (-0.798s) 184.269mph (37 laps)
32.
#93 Travis Kvapil Toyota
29.340s (-0.833s) 184.049mph (35 laps)
33.
#33 Landon Cassill Chevrolet
29.364s (-0.857s) 183.899mph (23 laps)
34.
#35 Josh Wise Ford
29.372s (-0.865s) 183.849mph (23 laps)
35.
#30 David Stremme Toyota
29.395s (-0.888s) 183.705mph (20 laps)
36.
#32 Ken Schrader Ford
29.417s (-0.910s) 183.567mph (19 laps)
37.
#7 Dave Blaney Chevrolet
29.418s (-0.911s) 183.561mph (29 laps)
38.
#83 David Reutimann Toyota
29.473s (-0.966s) 183.219mph (36 laps)
39.
#39 Ryan Newman Chevrolet
29.496s (-0.989s) 183.076mph (53 laps)
40.
#87 Joe Nemechek Toyota
29.499s (-0.992s) 183.057mph (28 laps)
41.
#38 David Gilliland Ford
29.611s (-1.104s) 182.365mph (36 laps)
42.
#47 Bobby Labonte Toyota
29.647s (-1.140s) 182.143mph (19 laps)
43.
#98 Michael McDowell Ford
29.884s (-1.377s) 180.699mph (15 laps)