Plug-in hybrids have emerged as the favorite form of transportation for reducing greenhouse gases in the near term, but calculating their energy efficiency can be a little complicated.
Plug-ins won't conk out after 130 to 200 miles, like electric cars, and they don't require major technological breakthroughs, like hydrogen cars. Converting a Prius to a plug-in hybrid costs about $10,000 to $15,000 now--that's part of the reason only about 50 exist--but if car manufacturers decide to make these at the factory, the additional cost may only run $6,000 or so, say proponents. That's a lower premium than what electric cars will run, by the way.
Hybrid cars are hot, but not
Hybrid cars are hot, but not as hot as their owners, who complain that their gas mileage hasn't come close to well-advertised estimates..it still needs parts like oxygen sensor that can indicate the level of unburned fuel in the exhaust so the computer can adjust the air- fuel level..therefore it will burn less gas..by Audi Oxygen Sensor