But even the company 's bullish " car tsar " , the vice-chairman , bob lutz , admits that the potential market for these vehicles has declined dramatically with higher oil prices .
Kellan lutz brought his new girlfriend sharni vinson to the premiere .
凯南鲁兹带了他的新女朋友沙妮文森来参加首映。
But in 2005 , after years of poor sales , gm vice chairman bob lutz famously called buick a " damaged brand , " and speculation was rife that the detroit auto giant would pull the plug .
" You can 't have a global recovery without the oil price recovering as well , " says lutz kilian , a university of michigan economist who has studied the effects of oil shocks .
