What is the fine-grained topic of the following text: “Besides leveraging innovation from the Chevrolet Volt, the Malibu Hybrid also has unique features that help improve aerodynamics, like upper and lower grille air shutters to improve airflow and a reduced ride height, all of which help reduce fuel consumption,” he said. Only return the topic.
Features of the Malibu Hybrid that improve aerodynamics and reduce fuel consumption