As fleet managers will tell you, hybrids are very good cars to own for fuel efficiency, but the way the driver is driving has a lot to do with the real numbers. Carnegie Mellon University researchers have found that driving conditions are a critical aspect to mileage achieved by hybrid electric vehicles, along with plug-in hybrid and battery electric vehicles. The study was released during a time with the Environmental Protection Agency is working on new fuel economy labels starting with 2013 vehiclesThe Article Researchers See Aggressive Driving Takes Away Green Vehicle MPG Benefits appeared first on Automotive Digest.