There are a variety of ways to find the gas mileage for a car, including looking in the owner's manual, researching the car's fuel efficiency online or calculating the average gas mileage by hand. In general, newer and smaller vehicles will have better fuel efficiency than older cars or larger vehicles, like SUVs and trucks.
Sites like the U.S. Department of Energy's fueleconomy.gov have the gas mileage information on most consumer vehicles, and vehicles that have exceptionally good fuel efficiency may also be listed by make and model in consumer buying guide lists like Autobytel's "Top 10 Best Gas Mileage Cars." Use the following steps to search for a specific car's gas mileage on fueleconomy.gov:
- Navigate to the "Find a Car" tab
- Enter in the car's information
Open up fueleconomy.gov in the Web browser and click on the "Find a Car" tab in the upper left-hand corner of the page.
Enter in the vehicle's make, model and year and select "Go."
The site then displays both the city and the highway average gas mileage for that specific vehicle. There is a combined average for highway and city as well as the average fuel costs per year for the vehicle. There are also online gas mileage calculator's that provide the approximate gas mileage after odometer readings and how much gas was put in the tank are entered.