* 4-cylinder engine (if equipped): This was a less common option. Expect mileage in the low 20s MPG (miles per gallon) combined (city and highway). City mileage would be lower, highway higher.
* V6 engine: This was the more common engine. Expect mileage in the mid-to-high teens MPG in city driving and low-to-mid 20s MPG on the highway. The combined MPG will likely fall in the low-to-mid 20s.
Factors affecting gas mileage:
* Driving habits: Aggressive acceleration and braking significantly reduce fuel economy.
* Vehicle condition: Proper tire inflation, regular maintenance, and a clean air filter all contribute to better gas mileage.
* Terrain: Driving in hilly or mountainous areas will reduce fuel economy.
* Climate: Extreme temperatures (hot or cold) can affect fuel efficiency.
To get a more precise estimate for *your* 2005 Chevy Impala, I recommend checking the following:
* Your owner's manual: This will have the EPA estimated fuel economy for your specific engine.
* The fuel economy sticker: This sticker (often located on the driver's side doorjamb) shows the EPA estimates.
* Online resources: Websites like fueleconomy.gov (in the US) provide fuel economy data for various vehicles. Enter your specific year, make, and model to get a better estimate.
Without knowing the specific engine in your Impala, a precise answer is impossible.
