Red Bull's fuel supplier ExxonMobil is aiming to introduce an upgrade at the British Grand Prix as the team looks to find performance to counter its Formula 1 engine deficit. Red Bull expected a major engine upgrade in Canada, but that didn't materialise, with Renault saying it's focus for the remainder of 2017 was reliability and incremental performance steps - one of which came in Baku. That has left Red Bull frustrated by the extent to which the engine is holding it back, with Max Verstappen concerned the lack of progress could hamper its chances of success in 2018. With that in mind, Red Bull is looking to ExxonMobil, which through its Mobil 1 and Esso brands became the team's official...
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