human
What should I do to make my car more fuel-efficient?
assistant
To make your car more fuel-efficient, you can try reducing your speed and using lower gears when possible. You can also look for ways to reduce the amount of air resistance in your car such as replacing old or worn out tires with new ones. Additionally, consider switching to a hybrid or electric vehicle if they fit your needs. Finally, try to keep your car clean by avoiding unnecessary idling and driving smoothly and steadily.