Adrian Sutil believes the season-opening Australian Grand Prix could be a lottery as Formula 1 enters a new era.
1.6 litre v6 power units have replaced 2.4 litre v8 engines and Sauber driver Sutil expects the uncertainty surrounding the pecking order to cause excitement.
"Everything is new," he said.
"Driving in qualifying will be very different to the race, because the cars will have more power than in the race."
The German driver predicts that the new regulations will provide a challenge for both drivers and engineers.
"Less downforce and more power will be a challenge for us drivers," he added.
"Higher top-speed and less grip on a street circuit like Melbourne will be exciting. Also the 100 kg of fuel [rule] will see nervous faces on the pit walls. We were able to gain experience regarding the fuel management during testing, but over a race distance everything has to come together flawlessly.
"It will be a lottery as to who will finish the race in front, and the excitement will be extremely high."