An EPA-estimated 25 MPG combined from the 2018 Chevrolet Impala’s 2.5L four-cylinder engine isn’t going to win any green awards, but it’s an acceptable figure for a large, comfortable, and affordable sedan. Buyers choosing this Impala are probably prioritizing space, value, and the simple, reliable operation of a naturally aspirated engine. In that context, the fuel economy is a reasonable trade-off.

City and highway performance

The EPA estimates for the 2018 Impala 2.5L break down to 22 MPG in the city and 30 MPG on the highway. These figures largely reflect the car’s tuning and its six-speed automatic transmission. The lower city MPG is typical for a larger, heavier vehicle that spends more time idling and accelerating from stops. The highway figure is respectable, aided by the transmission’s ability to settle into a lower-RPM cruise, allowing the engine to sip fuel while covering long distances. Gentle highway driving is key to hitting that 30 MPG mark; aggressive acceleration or sustained high speeds will certainly reduce fuel economy.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2018 Chevrolet Impala 2.5L is $1,750. This calculation is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. Individual fuel costs will vary depending on driving habits, location, and fluctuations in gasoline prices, but this figure provides a solid baseline for understanding how much the Impala could impact your budget. To see how this car compares across all Impala model years, exploring the data is useful.

Real-world expectations

While the EPA provides a standardized testing methodology, remember that your mileage may vary, especially if you don’t drive in the same conditions they use to test the vehicle. Real-world fuel economy for the 2018 Impala 2.5L can depend heavily on driving style, traffic conditions, and even the climate in which the car is operated. Drivers who accelerate quickly or those who frequently encounter stop-and-go traffic will likely see numbers closer to the lower end of the EPA range, or even slightly below. Conversely, those who accelerate smoothly and maintain consistent speeds, particularly on longer highway trips, may find themselves exceeding the EPA estimates. Regular maintenance, good tire inflation, and avoiding excessive idling are also key to maximizing fuel efficiency.

How it compares

The mid-size sedan market offers several alternatives in terms of fuel economy. The Toyota Camry LE with its 2.5L engine boasts a combined EPA rating of 32 MPG. Even the Honda Accord LX, which is also a 4-cylinder, comes in at 33 MPG combined. However, these alternatives often require different compromises. The Impala targets buyers who appreciate its generous interior space, comfortable ride, and traditional sedan experience, even if it means sacrificing a few MPG compared to smaller, more fuel-efficient competitors. You can see all Chevrolet fuel economy data to understand where the Impala fits within the brand’s lineup.

Tips to maximize efficiency

Gentle acceleration is key, especially with the 2.5L engine. Avoid stepping hard on the gas pedal, as this forces the engine to work harder and consume more fuel. Smooth, gradual acceleration maximizes efficiency, allowing the engine to operate within its optimal fuel-burning zone. This is especially important in city driving, where frequent starts and stops can quickly deplete fuel.

Maintain proper tire inflation at all times. Underinflated tires increase rolling resistance, requiring the engine to work harder to maintain speed. Check your tire pressure regularly and inflate tires to the recommended pressure listed on the driver’s side doorjamb. Proper tire inflation not only improves fuel economy but also extends tire life and enhances handling.

Limit idling as much as possible. Idling consumes fuel without covering any distance. If you anticipate a stop lasting longer than a minute, turn off the engine. Modern vehicles are designed to restart quickly and efficiently without causing excessive wear. Excessive idling is a common fuel-waster, particularly in urban environments and during cold weather warm-ups.

Avoid unnecessary cargo and weight. The heavier the vehicle, the more fuel it consumes. Remove any unnecessary items from the trunk and rear seats to reduce the overall weight of the vehicle. Carrying around heavy items like golf clubs or rarely-used tools can significantly impact fuel economy, especially on longer trips.

Use cruise control strategically on the highway. Cruise control maintains a consistent speed, helping to optimize fuel efficiency on long, level stretches of road. Instead, avoid using cruise control in hilly terrain, as the system may downshift frequently to maintain speed, resulting in increased fuel consumption. Smart cruise control use can contribute to significant fuel savings during highway driving.