ECOTEC 2.4L I4 DGI DOHC. Environmentally-Friendly Hybrid! You NEED to see this car! How tempting is the fuel economy of this good-looking 2012 Buick LaCrosse? Why take the bus, when this can get you there so much more conveniently and comfortably? Such wonderful gas mileage from the Hybrid engine means that you'll spend about as much on gas as you would have the bus fare!