Daniel Ricciardo believes this weekend’s Canadian Grand Prix will prove the “best test yet” to measure the success of Renault’s latest Formula 1 engine.  The French manufacturer introduced an upgraded power unit two races ago in Spain in a bid to boost both performance and reliability amid a disappointing start to the season. It was hoped the change would enable Renault to run its engine in a more powerful configuration throughout a race weekend, though the team has managed just one points finish in the last three rounds and languishes eighth in the constructors’ championship heading to Montreal. “This will be a good test for it,” Ricciardo said.  “We know we’ve...
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