26 MPG combined is a fair compromise for the 2023 Subaru Legacy AWD 2.4L. This figure reflects a practical mix of all-weather security, plenty of space for passengers and cargo, and a turbocharged engine that delivers confident acceleration. The Legacy buyer isn’t chasing ultimate efficiency; they prioritize year-round peace of mind and a comfortable ride, and are willing to accept a mid-pack fuel economy rating as part of the deal.

City and highway performance

The Legacy’s EPA estimates break down to 23 MPG in the city and 31 MPG on the highway. The city figure is respectable, a product of the efficient engine and smooth-shifting automatic transmission. The Intelligent Drive (SI-DRIVE) system, standard on the 2.4L turbo, allows drivers to tailor throttle response. “Intelligent” mode softens the throttle, prioritizing fuel savings in stop-and-go traffic. On the open road, drivers can expect to hit or even slightly exceed the 31 MPG highway rating. The Legacy remains stable and planted at cruising speeds, and the continuously variable transmission (CVT) with its eight simulated gear steps mimics a traditional automatic, avoiding the droning sensation sometimes associated with CVTs.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2023 Subaru Legacy AWD 2.4L is $1,700. This figure is based on driving 15,000 miles per year and using national average fuel prices. Individual fuel costs will vary depending on driving habits, local fuel prices, and the type of fuel used. The EPA figure provides a standardized benchmark for comparing the Legacy’s fuel costs with those of its competitors.

Real-world expectations

While EPA estimates provide a useful baseline, real-world MPG often differs. Aggressive driving, frequent short trips, and carrying heavy loads will all negatively impact fuel economy. Gentle acceleration, consistent highway speeds, and proper tire inflation can help drivers achieve figures closer to the EPA estimates, or even slightly higher. The onboard fuel economy monitor can provide valuable feedback on driving habits, encouraging drivers to adopt more fuel-efficient techniques. Owners who live in colder climates should recognize that their winter fuel mileage will be impacted negatively.

How it compares

The Legacy’s fuel economy is competitive within its class, but some rivals offer slightly better numbers. For example, the Toyota Camry Hybrid achieves an estimated 52 MPG combined, a significant advantage for those prioritizing fuel savings above all else. A non-hybrid Camry with the 2.5L 4-cylinder engine achieves 32 MPG combined, demonstrating the fuel economy commitment the Legacy buyer sacrifices for the standard AWD system. The Honda Accord, another major player in the midsize sedan segment, offers up to 48 MPG combined in its hybrid variant. The Nissan Altima, when equipped with front-wheel drive, can reach up to 39 MPG on the highway, surpassing the Legacy’s 31 MPG, though the Altima doesn’t offer AWD with its most efficient engine option. These comparisons matter to the Legacy buyer because they should recognize that they are making a conscious choice: trading a small MPG penalty for the all-weather control that Subaru’s symmetrical AWD system provides.

Tips to maximize efficiency

The SI-DRIVE system offers an easy way to prioritize fuel economy. Selecting “Intelligent” mode softens the throttle response, encouraging gentler acceleration and reducing fuel consumption, particularly in city driving. Don’t hesitate to switch to “Sport” mode for merging or passing, then revert to “Intelligent” mode to conserve fuel during steady cruising.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder, resulting in lower fuel economy. Check your tire pressure regularly, ideally weekly, and inflate them to the pressure specified on the driver’s side door jamb.

Avoid unnecessary idling. Modern engines are designed to operate efficiently, and idling burns fuel without covering any distance. If you anticipate waiting for more than a minute, it’s generally more fuel-efficient to turn off the engine and restart it when you’re ready to go.

Minimize aerodynamic drag. Remove any unnecessary items from the roof rack or cargo box when not in use. These accessories create drag, increasing fuel consumption, especially at highway speeds. Consider also how you load items inside the vehicle; a trunk packed to the roofline negatively impacts aerodynamics as well.

Keep your LEGACY MPG across all years running optimally with regular maintenance. Scheduled maintenance, including oil changes, air filter replacements, and spark plug replacements, ensures that the engine operates efficiently and delivers the best possible fuel economy. Consult your owner’s manual for the recommended maintenance schedule.

While the 2023 Legacy’s MPG may not be class-leading, it represents a sensible balance of capability and efficiency for its target buyer, delivering security and comfort without completely sacrificing fuel economy. Explore all Subaru fuel economy data to compare the Legacy’s fuel efficiency with other models in the Subaru lineup.