<human>:  How do I choose a fuel-efficient car?
<bot>: The best way to choose a fuel-efficient car is to do your research and compare different models. Consider the type of car you are looking for and then look at their fuel economy ratings. You can also find information on engine size and the type of fuel it requires, as well as other factors like cost and car manufacturer. Additionally, make sure to take into account any local tax incentives that may be available in your area for fuel-efficient cars.