Christian Horner sees more gains to come thanks to a fuel.
Many fans would welcome a reversal in thinking from the FIA.
A theory has been bouncing around the paddock that Red Bull's Total fuel might be a contributing factor.
According to report, Mark Webber was low on fuel when Vettel tried to do an overtake
The manufacturer of a crucial fuel flow sensor is now ready for F1's 2014 season.
Dr Helmut Marko insists there is no conspiracy at all
"Fuel was mentioned purely for illustrative purposes" - FIA spokesman