Re: BAR-Honda Banned for 2 Races
I believe that the extra tank itself was not the problem, other cars use similar systems, but rather that they cheated hidding the fuel in that tank in order to bypass the weight limit, and lied about it.
Here is a quote from FIA president:
"The facts in this case are very clear," said FIA president Max Mosley after the verdict was announced. "The team was asked to pump the fuel out of their car. They left 15 litres in the tank and told us it was empty. Under the circumstances, we feel they have been treated rather leniently."