Earlier this year Mitsubishi admitted to using some less-than-correct tactics when calculating the fuel economy of four of its Japanese market vehicles. But that wasn't the end of the scandal. The Japanese transport ministry has announced that its investigation into Mitsubishi's practices has revealed eight additional vehicles with misreported fuel economy numbers. Reuters reports: Earlier in the day, Japan's transport ministry said its investigation had shown the automaker had overstated the fuel economy for eight vehicles including the RVR, Pajero and Outlander SUV models, in addition to four minivehicles initially confirmed in April. The latest announcement deals another reputational blow to Japan's sixth-largest automaker, which has been struggling to recover from the mileage scandal, which affected two minivehicle models produced for Nissan Motor Co Ltd. The company's market value has tumbled since the scandal broke, and the ordeal prompted the company to seek financial assistance from Nissan, which agreed to buy a controlling one-third stake for $2.2 billion.