It’s not by chance that many of the vehicles getting better gas mileage are hybrid-electric vehicles (HEVs), also known as hybrid vehicles, or simply hybrids. Hybrid car mileage tends to be much better than conventional cars because they are built in a variety of configurations to achieve different objectives.
Hybrids combine an electric motor together with the best features of the internal combustion engine which makes them capable of big improvements in gas mileage without affecting performance or driving range. A little-known fact is that some hybrids are also configured to supply power for power tools or other electrical devices.
Hybrid vehicles are mainly powered by an internal combustion engine, just like a conventional vehicle. However, they also convert energy normally wasted during braking and coasting into electricity. Then this energy is stored in a battery until it is required by the electric motor. Internal combustion engines are least efficient in low-speed driving conditions, and when hill climbing or accelerating.
This is exactly the place where the electric motor kicks in, by assisting the gasoline engine in these low-efficiency situations. Some hybrids also shut the engine off automatically when the vehicle comes to a stop, and restart it when the driver steps on the accelerator.
This prevents further waste of energy by idling the engine when stopped. Unlike vehicles that are solely electric powered, hybrid vehicles don’t have to be recharged by plugging them into an external electrical source. All the energy the vehicle needs is provided by conventional gasoline and regenerative braking.
After reading this I am sure you can see how hybrid cars get great gas mileage
