Toto Wolff believes Aston Martin Red Bull Racing could be making a mistake by not using the same fuel and oil supplier as the works Renault Sport Formula One Team, and it could cost them some performance. Red Bull uses ExxonMobil as its fuel and oil supplier whereas Renault uses BP/Castrol, and as of 2018, they are the only customer outfit on the grid not to be using the same supplier as its engine partner. Mercedes-Benz prefers its own customer outfits to use the same Petronas fuel and oil as the works Mercedes AMG Petronas Motorsport team, while Scuderia Ferrari do likewise with their customers and Shell. Whilst Wolff, the Head of Mercedes-Benz Motorsport, has no doubt that ExxonMobil...
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