Sebastien Buemi says only a “good offer” from a F1 team could entice him away from his current motor racing forays.
Since losing his Toro Rosso seat at the end of 2011, the now 27-year-old Swiss has rebuilt his career by winning the world sports car championship in 2014.
He is also the reigning Formula E champion.
Buemi has also maintained his links with Red Bull, and last week at Mugello was developing Pirelli’s wide 2017-specification aboard the team’s modified 2015 test car.
“With these wide tyres the cars look super cool, and they’re fun on the inside of the car as well,” he told the Swiss newspaper Blick.
Red Bull team boss Christian Horner has advised to Renault that Buemi should be brought back into F1 full time, but the driver warned: “It would have to be a good offer for me to give everything up.”