14. 2015 Chevrolet Impala
After a so-so showing and performance in the last few years, the Chevy Impala is back in 2015 with a full suite of high-end features and comfortable additions inside the full-size sedan. For this year, buyers of the Chevy Impala will be treated to a new Impala model that runs on gasoline or a compressed natural gas or CNG. The model that runs on eAssist hybrid is out of the picture, but the Impala line still gets the 4-cylinder engine is still the base model that features the start-stop technology that can help promote fuel efficiency. There are three engines available, with the 3.6-liter V6 (bi-fuel) engine and3.6-liter V6 for high-end models.