27 MPG combined in the 2025 Buick Encore GX AWD 1.3L isn’t going to win any hypermiling awards, but it’s a respectable figure for the kind of buyer this small SUV attracts: someone who values a slightly elevated driving position, available all-wheel drive for winter weather confidence, and a touch of near-luxury refinement without a truly premium price tag. They prioritize ease of parking, maneuverability in urban environments, and a comfortable ride over outright fuel sipping. This isn’t a vehicle meant for serious off-roading or cross-country touring, but something that slots neatly into the space of daily commutes, errands, and the occasional weekend getaway.

City and highway performance

The EPA estimates for the 2025 Buick Encore GX 1.3L AWD reveal a somewhat surprising quirk: 26 MPG in the city and 28 MPG on the highway. This near-identical split suggests a powertrain calibration optimized for consistent efficiency rather than favoring one environment over the other. The nine-speed automatic transmission is a key contributor here, able to select the optimal gear for both low-speed stop-and-go driving and higher-speed cruising. Owners can expect relatively consistent fuel consumption regardless of whether they’re navigating urban congestion or putting miles on the open road, assuming a steady driving style.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2025 Buick Encore GX 1.3L AWD is $1,600. This calculation is based on driving 15,000 miles per year and using national average fuel prices. Of course, your actual fuel costs will vary depending on your personal driving habits, the price of gasoline in your area, and the proportion of city versus highway driving you typically do. It’s a helpful benchmark for comparing the Encore GX against other similarly sized SUVs, but remember to factor in your own individual usage patterns to get a more accurate picture.

Real-world expectations

While the EPA provides a standardized testing protocol, real-world fuel economy often deviates. Drivers with a lead foot, those who frequently carry heavy loads, or those who spend a significant amount of time idling in traffic will likely see figures below the EPA estimates. Conversely, drivers who adopt a more conservative driving style, prioritize smooth acceleration and braking, and minimize idling may achieve slightly better fuel economy than advertised. The small turbocharged engine is responsive, but it can get thirsty when pushed hard. Understanding the ENCORE MPG across all years will help to provide realistic expectations.

How it compares

The Buick Encore GX competes in a crowded segment of small SUVs. The Mazda CX-5, for instance, with its standard 2.5L engine and all-wheel drive, achieves a slightly lower 26 MPG combined. The Honda HR-V AWD manages around 28 MPG combined, a close competitor in terms of efficiency. A similarly equipped Nissan Rogue Sport also typically clocks in around 27 MPG combined, further highlighting the Encore GX’s position as a fairly average performer in its class. The Subaru Crosstrek, known for its standard all-wheel drive, comes in around 29 MPG combined. For the Encore GX buyer, these comparisons likely matter less than refinement and features; fuel economy is a factor, but not the deciding one. Owners can compare all Buick fuel economy data here.

Tips to maximize efficiency

Take advantage of the Buick Encore GX’s Eco driving mode, if equipped. This mode typically adjusts throttle response and transmission shift points to prioritize fuel efficiency over performance. While it might make the car feel slightly less responsive, it can contribute to noticeable savings over time, especially during city driving.

Regularly check your tire pressure and keep your tires properly inflated to the recommended PSI. Underinflated tires increase rolling resistance, which negatively impacts fuel economy. This is especially crucial with AWD vehicles, where all tires need to maintain optimal grip and efficiency to work together.

Minimize idling as much as possible. Modern engines consume a surprising amount of fuel when idling, so avoid unnecessary idling, particularly in stop-and-go traffic. If you anticipate being stationary for more than a minute or two, it’s generally more efficient to turn off the engine.

Avoid aggressive acceleration and braking. Smooth, gradual acceleration and anticipating stops well in advance can significantly improve fuel economy. The Encore GX’s nine-speed transmission benefits from a gentle touch, allowing it to shift smoothly and efficiently through its gears.

Consider removing any unnecessary weight from the vehicle. Carrying extra cargo reduces fuel efficiency. By removing items you don’t regularly need, like sports equipment or unused tools, you can lighten the load and improve your MPG.