Nine tech innovations that lead to savings at the pump

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Start-stop systems

Start-stop systems, such as the on available for the Volkswagen Golf, save fuel by turning off the engine when it is idling, such as at a stop light or while the car is waiting at a railroad crossing. A fast-acting electric motor restarts the engine in about 1/10th of a second. A start-stop system can improve fuel economy by about 6 percent.