22 MPG combined is not great, but it’s a number most 2015 Chevrolet Impala Limited 3.6L owners readily accept. This isn’t a car bought for efficiency; it’s a solid, spacious sedan often purchased as a fleet vehicle, a reliable workhorse, or by those prioritizing comfort and affordability over fuel savings. It’s a car chosen for its blend of dependable performance, vast interior, and no-nonsense approach, where a few extra stops at the pump are a reasonable trade-off.

City and highway performance

The EPA estimates for the 2015 Impala Limited equipped with the 3.6L V6 and six-speed automatic transmission are 18 MPG in the city and 29 MPG on the highway. That city figure reflects the engine’s need to work a bit harder in stop-and-go traffic, as the large sedan moves from light to light. The highway number, however, demonstrates the powertrain’s ability to cruise efficiently once up to speed. The 3.6L V6, while not a hybrid or designed for ultimate thrift, offers sufficient power to maintain highway speeds in a relaxed manner, contributing to that acceptable fuel consumption.

Annual fuel cost

The EPA calculates the annual fuel cost for this specific Impala configuration (3.6L V6) at $2,000. This figure is based on driving 15,000 miles per year, using a blend of city and highway driving, and assuming the national average fuel price. Individual fuel costs will vary depending on driving habits, local fuel prices, and the actual number of miles driven each year. However, $2,000 provides a standardized benchmark for comparing the Impala Limited’s fuel expenses against other vehicles. Someone who drives primarily highway miles might see a lower annual cost, while primarily city drivers could easily exceed this projection.

Real-world expectations

While the EPA’s estimates provide a useful starting point, real-world fuel economy will differ. Expect variations based on driving style, climate, terrain, and vehicle load. Aggressive acceleration, frequent braking, and carrying heavy loads will negatively impact fuel efficiency. Properly maintained tires, timely oil changes, and regular servicing will help ensure the car operates as efficiently as possible, maximizing the potential to approach or even slightly exceed the EPA estimates. Remember, the 29 MPG highway figure requires a light foot and consistent speed.

How it compares

Compared to other sedans in its class from that era, the 2015 Impala Limited’s fuel economy is in the middle. For instance, the Toyota Avalon with its 3.5L V6 achieved a slightly better 24 MPG combined. A similarly equipped Ford Taurus with its 3.5L V6 offered comparable fuel economy, with EPA ratings that were nearly identical. The crucial difference is often the driver’s priority. Someone actively seeking the most fuel-efficient large sedan might lean towards the Avalon. However, for buyers focused on price, interior space, and availability (particularly for fleet use), the Impala Limited is an alternative, even if it means sacrificing a mile or two per gallon. You can see IMPALA MPG across all years to contextualize the V6 fuel economy against the 4-cylinder models. Buyers should also consider the all Chevrolet fuel economy data when assessing their options.

Tips to maximize efficiency

Avoid aggressive acceleration. The 3.6L V6 has ample power, so there’s no need to floor it from every stop. Gentle acceleration allows the engine to operate more efficiently, conserving fuel and reducing emissions. Anticipate traffic flow and maintain a steady speed whenever possible. This is especially critical on the highway, where sudden changes in speed can significantly increase fuel consumption. The Impala Limited isn’t a sports car; drive it smoothly and consistently, and it will reward you with improved gas mileage.

Ensure your tires are properly inflated. Underinflated tires create more rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended level (found on the driver’s side doorjamb). A simple tire pressure check can make a noticeable difference over time.

Minimize idling. Idling burns fuel without covering any distance. If you’re stopped for more than a minute, turn off the engine. Even a short period of idling can waste a surprising amount of fuel, particularly in stop-and-go traffic. Modern cars are designed for frequent starts and stops, so don’t worry about harming the engine.

Reduce unnecessary weight. Carrying extra items in the trunk adds weight to the vehicle, which requires the engine to exert more effort, reducing fuel economy. Remove any unnecessary items from the trunk and back seats to lighten the load. This is a simple way to improve fuel efficiency without sacrificing comfort or convenience.

Use cruise control on the highway. Cruise control helps maintain a consistent speed, preventing unintentional acceleration or deceleration. This can significantly improve fuel economy on long highway drives. While it’s not suitable for all driving conditions, cruise control is a useful tool for maximizing efficiency on open roads.