Top 5 Luxury Large Cars with the best MPG

5. 18 city / 26 highway

2017 Mercedes Benz CLS

2017 Mercedes Benz CLS

4. 21 city / 30 highway

2017 BMW 6-Series

2017 BMW 6-Series

3. 17 city / 25 highway

2017 Kia K900

2017 Kia K900

2. 20 city / 30 highway

2017 Acura RLX

2017 Acura RLX

1. 22 city / 30 highway

2017 Cadillac CT6

2017 Cadillac CT6