I just found this thread over at another forum
2013 Cruze Diesel may get 50 mpg with Automatic - CleanMPG Forums
There's a guy in there hinting at an i30 (Elantra basically) turbo diesel coming to the US next year. He's also implying close to 100mpg. This seems way to good to be true, just wondering if anyone here had heard any rumors along these lines.