Scott Dixon at Sonoma

SONOMA, Calif. -- Scott Dixon, who has won three of the past four IZOD IndyCar Series races to vault into second place in the championship, topped the 30-minute warm-up session for the GoPro Grand Prix of Sonoma (4 p.m. ET today on NBC Sports Network).

Dixon, who will start on the front row alongside Target Chip Ganassi Racing teammate Dario Franchitti, posted a lap of 1 minute, 18.9674 seconds on the 2.385-mile, 12-turn road course. Ryan Hunter-Reay, who qualified fourth in the No. 1 DHL car, was second fast (1:19.4041). Andretti Autosport teammate Marco Andretti was third in the No. 25 RC Cola and Tony Kanaan jumped to fourth on the time sheet. He qualified 16th for the 85-lap race.

Click it: GoPro Grand Prix of Sonoma warm-up results || Starting lineup

Franchitti, who earned his 33rd career pole to break a tie with Michael Andretti for sixth all time, was fifth fast (1:20.0677). 

A Chip Ganassi Racing driver has won the past four races -- three in a row by Dixon and Charlie Kimball the most recent on Aug. 4 at Mid-Ohio Sports Car Course. Franchitti, who has 31 career victories, is seeking his first of the season.

Six different teams were represented in the top 10 of the warm-up. There have been nine different winners, including four first-time winners, in the 14 races. Up next is the Grand Prix of Baltimore presented by SRT on Sept. 1.

James Davison did not participate in the session as the Dale Coyne Racing crew was changing the Honda engine in the No. 18 entry. Davison, competing in his second IZOD IndyCar Series race, will incur a grid spot penalty for an unapproved engine change. He qualified 21st.