2015 Chevrolet Impala CNG Priced at $38,210

The 2015 Chevrolet Impala CNG, which runs on both compressed natural gas and traditional gasoline, will cost $38,210. At this price, it is about $10,000 more expensive than the base 2014 Impala. When the bi-fuel Impala goes on sale in the fourth quarter, it will be the first manufacturer-produced full-size sedan in North America to offer capability for both fuels. It will be available in two trim levels, including a base LS trim and an upper LT trim.
This unique Impala runs on natural gas until this reserve is depleted. Then, the engine automatically switches to gasoline. At any time, drivers can switch which type of fuel the car uses by pressing a button on the dashboard. Making this bi-fuel process possible is a special 3.6-liter engine with hardened valves that provide durability. While EPA fuel economy estimates have not yet been announced, Chevrolet expects the bi-fuel Impala to achieve a total city range of 500 miles, with 150 of those coming from natural gas.
Buyers can expect considerable savings on natural gas. On average, this fuel is $1.25 cheaper per gallon than gasoline, but this varies based on location. According to the U.S. Department of Energy, there are over 700 public CNG stations in the U.S. Source: General Motors