Mitsubishi Admits to Miscalculating Fuel Economy Since 1991 [UPDATED] - f1 cars motor MotoGP Blogs

Mitsubishi Admits to Miscalculating Fuel Economy Since 1991 [UPDATED]



In most ordinary automotive scandals, it takes months to years to uncover what drove executives to make poor decisions. Mitsubishi has taken only six days, and it’s just started digging.
Last week, Mitsubishi admitted to falsifying fuel-economy data on four Japanese-market kei cars, including two branded as Nissans. As of Tuesday, Mitsubishi said that starting in 1991, it had developed its own “high-speed coasting test” that spit out more optimistic numbers than the one mandated by the Japanese government. Among the many numbers for tire-rolling and air resistances calculated by Mitsubishi’s test, engineers selected a “relatively low value” for one trim of those late-model cars to “give the appearance of greater fuel [economy].” This was done, Mitsubishi said, to match higher fuel economy targets revised during the car’s development. Consequently, Mitsubishi then calculated fuel economy for three other trims, including one with a turbo engine and another with all-wheel drive, based on that flawed initial data. We’re a little confused at what’s happening, but so is Mitsubishi. The company said that in 2001, an internal test showed that there was no more than 2.3-percent deviation between Mitsubishi’s coasting test and the official coasting test and that despite an employee manual produced in 2007 that explicitly required the government test, Mitsubishi continued using its own version.

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