VW says fuel usage understated on some models; Porsche warns

Volkswagen on Tuesday said it had understated the fuel consumption of 800,000 cars sold in Europe, while majority stakeholder Porsche Automobil Holding SE warned that VW's latest findings could further weigh on its results. The latest revelation about fuel economy and carbon dioxide emissions, which Germany's largest automaker said represented a roughly 2 billion euro ($2.19 billion) economic risk, deepened the crisis at VW. The scandal initially centered on software on up to 11 million diesel v