Supercars Sydney: Mostert wins mixed-weather thriller

Some well-timed cautions helped bring Mostert into contention mid-way through the 300-kilometre race.

Once in contention there was no stopping Mostert, not even a late deluge able to deny the Walkinshaw Andretti United ace victory. 

Brodie Kostecki and Anton De Pasquale, who spent the entire race in the lead group, rounded out the podium. 

De Pasquale was the first leader of the race, the Dick Johnson Racing driver getting the jump on Kostecki at the start, but his stint at the front was short-lived as his soft compound rubber no match for the super soft tyres on both Kostecki and Broc Feeney's cars.

By the second lap Kostecki and Feeney were through, those two staging a brief battle for the lead before Kostecki took control of the first stint.

The gap between the pair hung around the two-second mark for much of the stint, with De Pasquale leading the way of the soft-shod cars around four seconds behind the leader.

Further back in the field it was a rollercoaster of an opening stint for Saturday race winner Shane van Gisbergen. Despite starting on the soft, the Kiwi made good early headway from 21st on the grid, getting as high as 12th by lap six.

Shane van Gisbergen, Triple Eight Race Engineering

Photo by: Edge Photographics

However he was then caught out by a burst of rain, a spin dropping him to the back of the pack and prompting a stop to take on wet tyres.

But that proved to be the wrong call. The rain was short-lived, van Gisbergen going a lap down before pitting again to go back to slicks.

Back at the front, De Pasquale kicked off the first round of stops for the leaders with a lap 25 switch to the super soft rubber. 

Kostecki stopped to swap his super softs for softs a lap later, while Feeney went a lap longer