23 MPG combined is the fuel economy for the 2019 Subaru Legacy AWD 3.6R, and while it’s hardly a Prius-rivalling figure, it represents an acceptable compromise for buyers who prioritize all-weather security and the reliable power delivery of a naturally aspirated six-cylinder engine. This isn’t a car purchased for hypermiling; it’s a car chosen for confident traction and reliable performance in demanding conditions, features that often overshadow outright fuel efficiency.

City and highway performance

The EPA rates the 2019 Subaru Legacy 3.6R at 20 MPG in the city and 28 MPG on the highway. This split reflects the engine’s tuning and the demands placed upon it in different driving environments. Urban driving, with its frequent stops and starts, inevitably takes a toll. The Legacy’s all-wheel-drive system, constantly engaged even in optimum conditions, adds drag that contributes to lower city fuel economy. On the open road, however, the Legacy can stretch its legs. The automatic (AV-S6) transmission’s overdrive gears help to reduce engine RPM at cruising speeds, allowing the 3.6-liter engine to operate within a more efficient range and achieve a respectable highway figure.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Subaru Legacy 3.6R at $1,900. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. It’s important to remember that this is just an estimate; your actual fuel costs will vary depending on your driving habits, the type of fuel you purchase, and prevailing gasoline prices in your area. Aggressive driving, prolonged idling, and consistent use of premium fuel (although not required, some drivers may choose to use it) will all increase your annual fuel expenditure. Check all Subaru fuel economy data to compare between models.

Real-world expectations

While the EPA provides standardized testing numbers, real-world fuel economy can differ. Factors such as driving style, terrain, and weather conditions can influence how many miles you get per gallon. Drivers residing in mountainous regions or those who frequently encounter stop-and-go traffic are likely to see lower MPG figures than those who primarily drive on flat, open highways. Properly maintaining your vehicle, ensuring correct tire inflation, replacing air filters regularly, and performing scheduled maintenance, can also positively impact fuel efficiency.

How it compares

The 2019 Legacy 3.6R competes in a fiercely contested segment. The Toyota Camry XSE V6, for example, boasts a slightly better EPA combined rating of 26 MPG. The Honda Accord 2.0T offers 26 MPG combined. However, neither of these offers standard all-wheel drive, a key differentiator for the Legacy. Opting for all-wheel drive in a Nissan Altima drops the combined EPA rating to 31 MPG for the 2019 model year. For the Subaru buyer, the trade-off between all-wheel drive and a few MPGs is a conscious decision, a validation of practicality and peace of mind over pure fuel conservation. See the LEGACY MPG across all years.

Tips to maximize efficiency

Smooth acceleration and braking are critical. The Legacy’s 3.6-liter engine responds well to a gentle touch. Avoid sudden bursts of acceleration and anticipate traffic conditions to minimize hard braking. The continuously variable transmission (CVT), while designed for efficiency, can sometimes encourage drivers to be less attentive to throttle input. Actively focus on maintaining a steady pace.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which directly impacts fuel economy. Check your tire pressure regularly and adhere to the recommended inflation levels listed on the driver’s side doorjamb. Even a slight deviation from the recommended pressure can noticeably reduce fuel efficiency.

Minimize idling. Idling consumes fuel without covering any distance. If you anticipate being stationary for more than a minute or two, turn off the engine. The Legacy’s engine restarts quickly and smoothly, minimizing any inconvenience. This is especially relevant in colder climates where drivers might be tempted to idle the engine to warm the cabin.

Reduce unnecessary weight. Hauling extra cargo in the trunk or on the roof rack adds to the vehicle’s overall weight, increasing fuel consumption. Remove any items that are not essential for your daily commute. A lighter vehicle requires less energy to accelerate and maintain speed.

Consider using cruise control on the highway. Cruise control helps maintain a consistent speed, which can improve fuel economy on long stretches of open road. Avoid using cruise control in hilly terrain; the system’s constant adjustments to maintain speed can sometimes lead to reduced fuel efficiency compared to carefully modulating the throttle manually.