DETROIT -- Automakers are rolling out several new hybrids at this year's North American International Auto Show as hybrid sales continue to grow at a phenomenal pace. But consumers are finding out that hybrids are more expensive and may save less fuel than they thought, which could put the brakes on future hybrid sales.

General Motors Corp. is making one of the most visible pushes, introducing two models with different types of hybrid power systems at the show in Detroit. Toyota Motor Corp. will introduce its new hybrid-powered Camry, while Ford Motor Co. will show off a sporty concept vehicle with a diesel-electric hybrid system it says gets up to 65 miles per gallon. Subaru also will have a hybrid concept at the show, which opens to the public Jan. 14.