Guardian: The car industry may be all atwitter with talk of plug-in cars and hybrid engines. But there was a cold, hard assessment on the ongoing dominance of petrol today from Bob Lutz, the veteran vice-chairman for product design at General Motors. Lutz, a top lieutenant to GM’s chairman Ed Whitacre, predicted that more than 90% of the automotive industry’s sales will continue to be petrol-driven vehicles for at least another decade – because the vast majority of motorists simply will not pay …