Both drivers finished with DNFs and lost their spots on the podium.
It made way for Palmerston North's Peter Bengston, who won the world 240s title for a second time at Rotorua.
"It was pretty lucky. In some ways you make your own luck but you also need luck," Bengston said.
"Joblin was just in front of us [when he crashed], it is sad for him but good for others."
Bengston finished 10th, first and fifth in his three races on Saturday night to take home the overall title on points.
"I'm rapt now. I won it six or seven years ago and it feels good to do it again."
Bengston almost missed out on making the 26-car final series on Saturday after finishing well down the rankings in his qualifying heat on Friday.
After the racing was done and dusted on Saturday night, people joked with Bengston he should qualify through the repechage more often.
The runner-up on Saturday was a crowd favourite, England's Frankie Wainman, who has raced at the world 240s an impressive 17 times and won it three times.
He said he would have liked to add to his three titles at the weekend but was happy with second place.
"I'm stoked with second," he said.
"It is awesome racing over here. It is totally different to what we have back home."
He said in England, stockcar racing includes racing by yourself on a track without any of the close-contact competition we have in New Zealand.
International drivers are invited to the event each year, giving the Rotorua event a world status.
The World 240s began in Palmerston North in 1987 but later moved to Rotorua.
Rotorua's top finisher on Saturday was Bryce Steiner who placed ninth overall in his 118R stockcar.
This year's winner, Bengston, said he would return to defend his crown next year.
Three drivers from Great Britain attended the event.
