Most people think the amount of fuel saved using a start-stop system is negligible, but in reality, that fuel burned while idling at a stop adds up quickly.
A study by the Society of Automotive Engineers found that using start-stop can see a car’s fuel economy improve by over eight percent in heavy traffic. That might not sound like a lot, but over time, it adds up to a whole lot of wasted gas.
Read the article at Road & Track.