[Garry]

Nick Wirth explained it in qually this morning:

- monocoque had to be signed off design-wise in June
- Cosworth supplied facts and figures for fuel consumption at the time, so car designed with small margin of error in MPG/tank capacity.
- fuel density regs changed at Brazil 09, moving the goalposts
- most other teams have bigger margin of error so are unaffected
- Wirth believes that ''at least one other team has the same problem but its not come out yet''.

They are going to redesign the car and introduce a VR01 Spec B at Barcelona, with bigger tank and other step ups in performance.