Last year’s title protagonists, Jamie Whincup and Scott McLaughlin had tough days; Whincup failing to finish with a transmission failure while leading and McLaughlin 10th after being delayed by a puncture.
The 250km, 78-lap contest went without a Safety Car, with the winner completing the journey in just one hour and 48 minutes.
With the weekend’s results, Red Bull Holden Racing Team driver van Gisbergen leads the championship with a perfect 300 points over Reynolds on 258 and James Courtney on 240.
After their problems, McLaughlin and Whincup are fifth and 15th – on 207 and 102 points –respectively.
Whincup took the lead off the line with a slick getaway from second and looked well on his way to a first win on the season.
He made his first stop on lap 16 and emerged five seconds clear of van Gisbergen as the effective race leader.
That margin only grew over the next 15 laps and was out to more than 10 seconds by the time Whincup slowed with a transmission problem and crawled back to pitlane.