There are plenty of different schools of thought on the matter, but the truth depends on what type of car you have.

As EU mulls new regulations, a real-world study of a million PHEVs shows even when charged up, they still use 3x as much gas ...

The internal combustion engine, for all its mechanical sophistication, still runs on a 19th-century mechanical idea: pistons rising and falling, a crankshaft spinning, a steam-age architecture ...

Data suggests that PHEVs consume more than three times as much fuel as their official ratings suggest. On paper, the average ...

While saving money at the fuel pump is usually the priority, gasoline-electric hybrid vehicles are proving to be more ...