Using the active eco button on the highway doing 65-70 I got the 40.5. With the button off and driving the same exact way I was getting between 37mpg.. Hyundai Forum is a community for all Hyundai Owners to talk and learn all about their favorite subject: Hyundai cars from the Sonata to the Elantra and even the new Kona! Show Less .. Taming the Green Machine: Unveiling the Mystery of Active Eco on Your Hyundai Tucson. Hey there, fellow Tucson tamers! Ever stared at that little green button on your dashboard and wondered, "What sorcery is this?" Well, fret no more, because we're here to crack the code on Active Eco and turn you into a mpg-maximizing maestro (without the need for a pointy hat).
Hyundai Active ECO is an efficient and easy-to-use system that can help drivers get the most out of their vehicles. An Overview Of Hyundai's Active ECO System. Hyundai's Active ECO system is a driver-assist system that helps drivers get the best fuel economy in their vehicles. This system is standard on many Hyundai models and is designed.. The Active Eco feature in the Hyundai Sonata is a subtle yet effective way to improve fuel efficiency and create a more relaxed driving experience. It's not a dramatic, game-changing technology, but it's a smart, well-implemented feature that shows Hyundai's commitment to both performance and economy. It's a quiet reminder that.