2015 Chevrolet Impala bi-fuel CNG

It is good that North American auto makers are embracing locally sourced fuels to power their cars. CNG and LPG are good alternatives to oil and cost a lot less. Mileage is not quite as good, and the engines need correct and proper maintenance to run efficiently, but when driving these cars, dependence on foreign oil is reduced. Good work GM on the 2015 Chevrolet Impala.