The six-time IndyCar champion passed polesitter Colton Herta for the lead when the Andretti Autosport driver was still bringing his tyres up to temperature having pitting one lap later than Dixon, and held on to win by 0.8 seconds after 85 laps of the Canadian street track.
His 52nd career victory meant the Chip Ganassi Racing driver drew level with Mario Andretti in the all-time win stakes, albeit 15 behind record-holder AJ Foyt.
