Apr.2 (GMM/Inautonews.com) The 2012 ‘F-duct’ controversy looks set to keep running for now.

“It’s not over yet,” confirmed Red Bull advisor Dr Helmut Marko to Germany’s Auto Bild.

In Australia and Malaysia, the threat of results protests hung over the opening races of 2012, due to some teams – chiefly Red Bull and Lotus – questioning the legality of the aerodynamic innovation on Mercedes’ 2012 car.

Until now, the FIA has declared that the system – working in unison with the driver-operated DRS – is fully legal.

But it has emerged that Lotus technical director James Allison has come up with another argument against the technology that will be posed to the FIA’s Charlie Whiting ahead of scrutineering for next weekend’s Chinese grand prix.

It is believed that while Ferrari is on Red Bull and Lotus’ side at present, Mercedes-powered McLaren is currently staying out of the debate altogether.