With the oil and refining sectors providing evidence that $4 per gallon gasoline may represent a floor, auto makers are beefing-up efforts to improve and introduce electric cars, MarketWatch reported Wednesday.

While the new wave of hybrids and electric cars will emphasize plug-in technology (the ability to recharge the car's battery from a standard 110-volt outlet), industry executives and think tank analysts underscored that a series of government incentives and programs will be needed to enable large-scale production of plug-in hybrids and electric cars. Selected automakers have set the 2010 model year as a target for rolling out the new cars en masse.

Economist Glen Langan told BloggingStocks Wednesday the automakers' roll-out timetable may be a tad optimistic.

"What we're seeing now from General Motors (NYSE: GM), Ford (NYSE: F) and others is that classic, delayed, rush-to-the-future response so typical of a sector that's behind," Langan said. "U.S. auto makers and others should have developed at least a hybrid that could compete with gas engines 10 years ago. But they chose not to and battery technology is behind as a result. I don't think we will see a cost-effective plug-in electric in 2010, and we'll be fortunate if a cost-effective, plug-in hybrid will be in mass production by 2012 or 2013."