<b>DOUBLE TANKS?:</b> Mercedes chairman Niki Lauda says there are rumours that certain teams might have an extra fuel tank. <i>Image: AP/Kerstin Joensson </i>
BARCELONA, Spain - The issue of 'fuel flow' has returned to the Formula 1 paddock.
Earlier in 2015, GMM reported that the FIA was clamping down on monitoring the maximum allowed fuel-flow limit, amid suspicions top manufacturers may have found a loophole.
It was suspected some teams - perhaps Ferrari and Mercedes - had found a way to increase fuel flow at certain moments whilst always ensuring the FIA's fuel flow meter was not alerted.
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