When choosing a car, you most likely consider its fuel-efficiency as one of the key factors. The world is also becoming more concerned with environmental sustainability and reducing carbon emissions. Here are some of the technologies that carmakers have come up with and improved to create more fuel-efficient cars: 1. Direct Injection Direct injection technology, also known as fuel stratified injection or direct stratified charge, delivers gasoline directly into the cylinder without having to go through the intake manifold. This technology improves fuel-efficiency, as the gasoline and air get to burn completely. Spray timing is also precise because the system can regulate the amount of fuel needed at a given time. As such, gasoline is only sprayed into the cylinders when