Scott Dixon quickest on sixth day of Indianapolis 500 practice

Dixon finished the day just ahead of Sarah Fisher Hartman's Josef Newgarden and Ganassi stable-mate Graham Rahal, and said that the team had been making steady progress with the car throughout the week.

"We've taken this week a little slower," said the New Zealander. "We didn't have the speed; these speeds are all big tows, so it doesn't really matter much.

"For us, we're just working on the race car, and I think we've made big improvements on how it feels. For me, I feel happy because we made the car feel a lot nicer to drive, and especially in traffic it pulls up better.

"Tomorrow and Saturday are going to be totally different stories to see who's got what out there by themselves, so that will be interesting."

Teams will have their boost levels turned up for from 130 to 140 kPA for Fast Friday, Pole Day on Saturday and Bump Day on Sunday, which the series predicts will result in an extra 40 to 50 horsepower.

Boost will be reduced to its normal speedway levels for the race.

Pos  Driver               Team/Car                      Time      Gap
 1.  Scott Dixon          Ganassi DW12-Honda            40.3428s
 2.  Josef Newgarden      Fisher DW12-Honda             40.4115s  + 0.0687s
 3.  Graham Rahal         Ganassi DW12-Honda            40.5259s  + 0.1831s
 4.  Will Power           Penske DW12-Chevy             40.5529s  + 0.2101s
 5.  Justin Wilson        Dale Coyne DW12-Honda         40.5927s  + 0.2499s
 6.  Ryan Briscoe         Penske DW12-Chevy             40.6302s  + 0.2874s
 7.  Wade Cunningham      Foyt DW12-Honda               40.6413s  + 0.2985s
 8.  Dario Franchitti     Ganassi DW12-Honda            40.6606s  + 0.3178s
 9.  Charlie Kimball      Ganassi DW12-Honda            40.6649s  + 0.3221s
10.  JR Hildebrand        Panther DW12-Chevy            40.7200s  + 0.3772s
11.  Mike Conway          Foyt DW12-Honda               40.7425s  + 0.3997s
12.  Alex Tagliani        Herta DW12-Honda              40.7803s  + 0.4375s
13.  Oriol Servia         Panther/DRR DW12-Chevy        40.7899s  + 0.4471s
14.  Helio Castroneves    Penske DW12-Chevy             40.7982s  + 0.4554s
15.  Bryan Clauson        Fisher DW12-Honda             40.8184s  + 0.4756s
16.  Tony Kanaan          KV DW12-Chevy                 40.8781s  + 0.5353s
17.  Takuma Sato          Rahal DW12-Honda              40.9277s  + 0.5849s
18.  James Jakes          Dale Coyne DW12-Honda         40.9414s  + 0.5986s
19.  Ana Beatriz          Andretti/Conquest DW12-Chevy  40.9828s  + 0.6400s
20.  Rubens Barrichello   KV DW12-Chevy                 41.0149s  + 0.6721s
21.  Michel Jourdain Jr   Rahal DW12-Honda              41.0673s  + 0.7245s
22.  Ed Carpenter         Carpenter DW12-Chevy          41.0781s  + 0.7353s
23.  EJ Viso              KV DW12-Chevy                 41.1806s  + 0.8378s
24.  Townsend Bell        Schmidt DW12-Honda            41.1846s  + 0.8418s
25.  Sebastien Bourdais   Dragon DW12-Chevy             41.9161s  + 1.5733s
26.  Jean Alesi           Fan Force DW12-Lotus          43.3758s  + 3.0330s
27.  Simona de Silvestro  HVM DW12-Lotus                43.7552s  + 3.4124s