Ferrari and Mercedes were the subject of a detailed investigation after the Canadian Grand Prix to ensure neither outfit was using trick oil systems to boost performance, Motorsport.com has learned. With the two leading the championship, there have been suggestions that they could be exploiting loopholes in the regulations to try to gain a performance advantage. Such fears were the catalyst for an FIA clampdown on the fuel systems in the Spanish Grand Prix as the governing body moved to stop teams trying to store petrol beyond the flow meters to try to get a power boost. Now, the focus has shifted to oil systems and whether or not some teams have been adding performance-boosting chemicals...
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