High gas prices are dri­ving con­sumers to small­er, 4-cylin­der cars and away from trucks and SUVs. The decade-long reign of the SUV for per­son­al use may be over. Many believe this trend will be long last­ing. Automak­ers that ignore the move to small­er cars do so at its own per­il. This is bad news for Detroit’s automak­ers that put their eggs in the high­ly prof­itable full­size truck and SUV mar­ket. Their import com­peti­tors have more numer­ous and pop­u­lar entries in the low­er end of the car mar­ket.