Red Bull motorsport boss Helmut Marko has vented another threat to quit Formula 1 if future engine regulation changes don't improve.
F1 sporting manager Ross Brawn is hard at working defining the sport's future technology path beyond 2020 when the currents set of rules expire.
But Red Bull is putting several conditions on the table, and if they are not enforced, the energy drinks company could leave Formula 1 altogether.
"The idea is very simple. We want an engine that is 1000hp, with a single standard KERS and battery, and development does not cost more than 15-20 million," Marko told El Confidencial.
"They should have sound, and allow the driver to make the difference. And independent companies like Ilmor and Cosworth should be able to enter so that we or McLaren can use them if we want," he said.
And if those conditions cannot be met, Marko confirmed that Red Bull might quit F1.
"Yes," he said, "because last year Mercedes would not give us an engine, neither would Ferrari, and Renault was only forced by Ecclestone to give us one.
"We want to have an equal situation where we are not blackmailed by a manufacturer," Marko added.
Win the ULTIMATE TRACKDAY with F1i.com!
GALLERY: All the action from Barcelona on Sunday
Keep up to date with all the F1 news via Facebook and Twitter
Cadillac F1 CEO Dan Towriss has made clear that Sergio Perez’s value to the American…
Formula 1 world champion Kimi Antonelli received a particularly special welcome home this week, with…
Lando Norris has revealed that Lewis Hamilton’s longevity and continued ability to compete at the…
Former F1 driver Brett Lunger, born on this day in 1945, is pictured here hitching…
Ralf Schumacher has once again questioned Lewis Hamilton's credentials at Ferrari, arguing that the seven-time…
Mercedes team principal Toto Wolff has revealed that he offered his resignation to Mercedes-Benz group…