* Vehicle size and weight: A large SUV with a V8 will get significantly worse gas mileage than a smaller, lighter car with a V8.
* Engine size and type: A 4.0L V8 will be more fuel-efficient than a 6.2L V8. Technology like direct injection and cylinder deactivation also impacts efficiency.
* Driving habits: Aggressive acceleration and frequent high-speed driving drastically reduce fuel economy.
* Transmission type: Automatic transmissions generally offer slightly better fuel economy than manuals, but this difference can vary.
* Aerodynamics: The shape of the vehicle affects how much fuel is needed to overcome air resistance.
* Maintenance: Properly maintained vehicles tend to get better gas mileage.
You'll find V8s achieving anywhere from 12 mpg (city) to over 25 mpg (highway), depending on the factors listed above. To get a more precise estimate, you'll need to specify the make, model, and year of the vehicle in question, and then consult the EPA fuel economy estimates or owner's manual. Websites like fueleconomy.gov (for US vehicles) can be helpful.
