The EPA says Hyundai and Kia overstated the fuel efficiency of more than 900,000 of their recent vehicles by as much as 6 miles per gallon, reports the Los Angeles Times. The South Korean automakers apologized, blamed "procedural errors," and promised to send customers debit cards to reimburse them for the extra fuel costs. (And for those who bought the models because of the wrong figures, well tough luck.)
Most were off by 1 or 2mpgs, but the Kia Soul was off 6—it gets 29mpg, not 35, reports CNNMoney. About 35% of the automakers' 2011-13 cars were affected. See the Hyundai models involved here, and Kia's here.