Seems like Toyota will always be ahead of the game. As Japan toughens up the fuel economy standards and Toyota has announced that the Prius hybrid has already met these new 2015 fuel efficiency procedures.
Under Japans previous 10.15 mode test, the Toyota Prius manages a whopping 35.5 km/l (83.5mpg in the US). Of course, this was looked into by many who thought this was unrepresentative of what the Prius typically achieves...
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