The 2026 Buick Encore GX FWD with the 1.3L 3-cylinder engine gets a combined 30 MPG. This figure puts it in a competitive segment where efficiency is often weighed against a perception of luxury. This isn’t a vehicle built for outright performance; it’s a smart-sized crossover for urban professionals, small families, or empty nesters who want maneuverability, a comfortable ride, and current styling without spending too much on gas. Its goal is clear: provide an accessible luxury experience with reasonable running costs, and that combined 30 MPG is a main draw for buyers focused on their monthly expenses. This buyer wants Buick’s quiet refinement and understated design, not a gas guzzler, so 30 MPG is an important baseline for them.

City and highway performance

The 30 MPG combined figure breaks down to 29 MPG in city driving and 31 MPG on the highway. In urban areas, with stop-and-go traffic and low-speed maneuvers, 29 MPG is a solid showing for a vehicle this size and weight. The 1.3L turbocharged three-cylinder engine, paired with an automatic transmission (effectively a continuously variable transmission or CVT), works well in this kind of driving. Its torque delivery is immediate at lower RPMs, which helps the Encore GX feel quick off the line and minimizes the engine’s effort in congested areas, directly contributing to that good city number. On the highway, 31 MPG might seem like a small increase over the city figure, but it reflects different engineering goals. While many larger engines might see a bigger jump in MPG on the open road, the Encore GX’s smaller displacement engine is already efficient in the city. On the highway, it maintains that efficiency, cruising comfortably without feeling strained, and keeping momentum easily, showing consistent fuel efficiency across different driving conditions. This consistency is a key selling point for buyers who frequently drive in both cities and on interstates.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2026 Buick Encore GX FWD 1.3L at $1,450. This figure is based on several standard assumptions: driving 15,000 miles per year, with about 45% highway and 55% city driving, and using national average fuel prices, which for the EPA’s estimate typically hover around $2.80 – $3.00 per gallon for regular unleaded. For the target buyer of the Encore GX, this $1,450 annual cost is very appealing. It means predictable and manageable running costs, making it an easy vehicle to budget for. Buyers in this segment often prioritize long-term affordability along with the initial purchase price, and an annual fuel bill well under $1,500 speaks to that value. It’s a clear sign that the Encore GX is designed to be a financially sensible daily driver, a vehicle that offers upscale touches without the high operating expenses often associated with luxury brands. Those interested in how Buick’s figures stack up across their lineup can find all Buick fuel economy data on our site.

Real-world expectations

While the official EPA numbers provide a reliable benchmark, real-world fuel economy can, and often does, vary. For the 2026 Encore GX FWD 1.3L, drivers should expect its 30 MPG combined to be quite achievable under sensible driving conditions. The efficient 1.3L three-cylinder engine and the well-calibrated CVT show General Motors’ commitment to efficiency in their smaller platforms. Aggressive acceleration, frequent hard braking, and sustained high-speed highway cruising (especially above 75-80 mph) will naturally lower these numbers. Conversely, drivers who drive smoother and anticipate traffic in mixed conditions can often match, or even slightly exceed, the EPA estimates. Headwinds, heavy payloads, and consistent use of climate control systems will all introduce variables that can impact efficiency. However, the Encore GX’s powertrain is designed for efficiency; it’s not a large V6 or V8 struggling to maintain good MPG, so its performance window for real-world driving is relatively tight and predictable. Most owners will find their personal average hovering comfortably around the 28-32 MPG mark, showing the car’s mission as a practical, economical choice.

How it compares

The 2026 Buick Encore GX FWD 1.3L enters a hotly contested segment, but its 30 MPG combined positions it very favorably against key rivals, especially considering its near-premium aspirations. For instance, the Mazda CX-30 with its 2.5L engine typically gets around 29 MPG combined (26 city/33 highway), very close to the Encore GX, though the Mazda often feels a bit more engaging to drive. The Honda HR-V, an efficient leader in the subcompact SUV class, comes in at 28 MPG combined for its FWD models (28 city/33 highway), making the Encore GX slightly more efficient in mixed driving. Toyota’s C-HR (FWD only) gets 29 MPG combined (27 city/31 highway), again putting the Encore GX right on par or slightly ahead. Subaru’s Crosstrek, often chosen for its standard AWD, typically posts 29 MPG combined (27 city/34 highway) with its 2.5L engine, but its AWD system does add a slight drag on efficiency compared to FWD competitors. Even within GM’s own stable, the mechanically similar Chevrolet Trailblazer with the same 1.3L engine and FWD also gets 30 MPG combined, illustrating the shared platform’s inherent efficiency. What sets the Encore GX apart for its specific buyer, beyond the competitive MPG, is the combination of its quiet cabin, somewhat softer ride, and Buick’s more upscale interior finishes, all while delivering similar or superior fuel economy to its direct competitors. For a full comparison of the model’s efficiency across years, check out ENCORE MPG across all years.

Tips to maximize efficiency

To truly get the most out of your 2026 Buick Encore GX 1.3L’s fuel economy, start by practicing smooth driving habits. Avoid quick starts and sudden, hard braking; instead, accelerate gradually and anticipate traffic to allow for gentle deceleration. The Encore GX’s CVT is designed to operate most efficiently with a light foot, keeping the engine in its optimal power band.

Maintaining proper tire pressure is a simple yet often overlooked method for saving fuel. Underinflated tires increase rolling resistance, forcing the engine to work harder. Check your Encore GX’s tire pressure monthly, referring to the sticker inside the driver’s door jamb for the recommended PSI.

Consider using your cruise control on the highway, even on slightly undulating terrain. While some suggest turning off cruise control on hills, the Encore GX’s system is generally good at maintaining speed with minimal throttle input, often proving more efficient than inconsistent manual inputs.

Minimize unnecessary weight in the vehicle. While the Encore GX isn’t designed for heavy hauling, even small amounts of extra weight add up over time, requiring more energy to move. Regularly clear out any items from the trunk or cabin that aren’t essential for your daily commute.

Finally, while the 1.3L engine is turbocharged, using regular unleaded fuel is perfectly acceptable and what the car is designed for. There is no efficiency or performance benefit to using premium fuel unless specifically stated by Buick for a different powertrain configuration, which is not the case for this FWD 1.3L model. Stick to regular to keep operating costs aligned with the EPA’s estimate.