JR Hildebrand recorded the fastest lap on the final day of IndyCar's pre-season test at Phoenix while Kiwi Scott Dixon was just 11th.
Hildebrand, who replaced Josef Newgarden at Ed Carpenter Racing this year, posted a lap of 193.23 mph (310.97km/h) on the oval circuit.
"We'd certainly rather be quick than not and we felt good about the laps we've been putting in," Hildebrand said.
Despite setting the best time Hildebrand was involved in an accident later in the session - Alex Rossi, Graham Rahal, Takuma Sato, Newgarden and Sebastien Bourdais were other drivers that were involved in incidents.
Carpenter himself set the second fastest time of the day while the Penske trio of Newgarden, Helio Castroneves and Will Power were third, fourth and fifth.
Defending series champion Simon Pagenaud was eighth fastest.
The season begins with the Grand Prix of St. Petersburg on March 12.