<human>: I need a new car. What are the best cars for gas mileage?
<bot>: The best cars for gas mileage depend on your needs and budget, but some of the most fuel-efficient options include hybrid models such as the Toyota Prius, Honda Insight, Ford Fusion Energi, and Chevrolet Volt. Other great choices include small cars like the Nissan Sentra and Kia Rio, which typically offer excellent gas mileage ratings.