Euronova's Sergey Sirotkin ended his Auto GP season on a high by taking victory in the the series' final race of 2012 at Sonoma.
Although the 17-year-old completed his pre-race goal of winning, fifth place for race one victor Pal Varhaug secured the runner-up position in the drivers' standings for the Virtuosi UK driver.
After the disappointment of a first-lap retirement in Saturday's race one, champion Adrian Quaife-Hobbs charged from 12th on the grid to finish second. The Briton pitted a lap later than Sirotkin for his mandatory tire change on lap six, and was held up by Antonio Spavone on the pit limiter through the lengthy pitlane entry. After the pit stop phase, Sirotkin enjoyed a marginal pace advantage over Quaife-Hobbs and eked out a 3.2-second margin of victory.
Former Italian Formula 3 champion Sergio Campana claimed the final place on the podium in his first outing for Zele Racing. The Italian hustled reversed-grid poleman Spavone for the lead in the opening laps, but lost ground during a troubled pit stop. Campana exited the pitlane in ninth, but produced fine overtaking maneuvers on Varhaug and Spavone to deservedly progress to third.
Daniel de Jong was another to suffer a problematic tire change. The Rotterdam racer snatched sixth place from Max Snegirev two laps from home.
While sometime GP3 racer Spavone enjoyed a strong getaway, fellow front-row starter Kotaro Sakurai failed to move away from the grid, causing the pack to take avoiding action.
The safety car was called out to remove Sakurai's stranded Euronova machine. The Japanese driver was joined in retirement by early leader Giancarlo Serenelli, who slowed with apparent technical difficulties. IndyCar racer Pippa Mann finished eighth in her second race.