Driving Habits:
* Speed: Higher speeds drastically reduce fuel efficiency. The faster you go, the more air resistance you fight.
* Acceleration: Aggressive acceleration consumes more fuel than smooth, gradual acceleration.
* Braking: Frequent hard braking wastes energy and reduces fuel economy.
* Idling: Letting your engine idle for extended periods burns fuel without moving the car.
* Traffic conditions: Stop-and-go traffic significantly lowers gas mileage compared to highway driving.
Vehicle Condition:
* Tire pressure: Under-inflated tires increase rolling resistance, lowering fuel efficiency. Check and inflate your tires to the manufacturer's recommended pressure (found in your owner's manual or on a sticker inside the driver's side doorjamb).
* Tire tread: Worn tires also increase rolling resistance.
* Alignment: Poor wheel alignment can cause increased tire wear and reduce fuel efficiency.
* Engine performance: Problems with the engine, such as a faulty oxygen sensor, mass airflow sensor, or spark plugs, can affect fuel consumption.
* Transmission issues: Problems with the transmission can also impact fuel economy.
* Air filter: A clogged air filter restricts airflow to the engine, reducing efficiency.
* Weight: Carrying extra weight in the car reduces gas mileage.
External Factors:
* Fuel quality: Using lower-grade fuel can slightly reduce fuel economy.
* Weather conditions: Driving in cold weather can slightly reduce fuel economy due to factors like needing more energy to heat the engine. Headwinds and hills also impact fuel consumption.
* Altitude: Higher altitudes can also slightly affect fuel economy.
If you've noticed a significant and sudden drop in your Impala's gas mileage, it's best to have it checked by a mechanic to rule out any underlying mechanical issues. They can diagnose problems and recommend solutions.
