21 MPG combined isn’t going to win any awards, but for the front-wheel-drive 2021 Buick Enclave with its 3.6L V6, it’s a figure many owners deem adequate. This vehicle is designed for comfort, space, and a smooth ride above all else, and its target demographic—families needing three rows of seating, empty-nesters seeking a comfortable road trip vehicle, and those prioritizing a quiet, luxurious experience—often accepts the trade-off in fuel efficiency. They prioritize the vehicle’s strengths, understanding that outright frugality isn’t the Enclave’s primary mission.

City and highway performance

The EPA estimates the Enclave’s city fuel economy at 18 MPG, a number that reflects the realities of stop-and-go driving with a naturally aspirated V6. This isn’t surprising, as the engine needs to work harder to get the Enclave moving from a standstill, and the frequent braking dissipates kinetic energy. On the open highway, the Enclave fares noticeably better, achieving 26 MPG. This improvement is thanks to the 9-speed automatic transmission, which allows the engine to cruise at lower RPMs, and the Enclave’s inherently aerodynamic profile for a vehicle of its size. The higher highway MPG is especially relevant for those long road trips that the Enclave is so well-suited for.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2021 Buick Enclave FWD at $2,100. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, and using national average fuel prices. This number provides a standardized benchmark for comparing the Enclave’s fuel costs against other vehicles, but individual expenses will vary depending on driving habits and local fuel prices. Drivers who primarily stick to the city will likely exceed this estimate, while those who spend more time on the highway may find their actual fuel costs are lower.

Real-world expectations

While EPA estimates provide a good baseline, real-world MPG can vary. A heavy foot, frequent use of accessories like air conditioning, and carrying heavy loads can all negatively impact fuel economy. Conversely, gentle acceleration, consistent highway speeds, and proactive maintenance can help drivers get closer to, or even exceed, the EPA estimates. Many Enclave owners report that achieving the 26 MPG highway figure is quite realistic on long trips, particularly when using cruise control.

How it compares

In the realm of three-row SUVs, the 2021 Buick Enclave’s fuel economy puts it in a competitive, albeit not class-leading, position. Consider the Acura MDX, another popular three-row SUV, which achieves 19 MPG city and 26 MPG highway with its FWD configuration. The Kia Telluride, known for its value and spaciousness, offers comparable fuel economy, with the EPA rating it at 20 MPG city and 26 MPG highway.

The Ford Explorer, a longtime staple in the segment, lands roughly in the same ballpark depending on the engine. The EcoBoost models generally trade some power for slightly better efficiency than the Enclave’s V6, while the V6 Explorers are closer to the Enclave in mileage. These comparisons matter to the Enclave buyer, who is often cross-shopping these vehicles and weighing fuel economy against other factors like interior comfort and styling.

For more fuel economy data, check out all Buick fuel economy data. You can also find ENCLAVE MPG across all years for comparison.

Tips to maximize efficiency

Gentle acceleration is key to maximizing fuel economy in the Enclave. The 3.6L V6 delivers ample power, but using that power excessively will drain fuel quickly. Avoid abrupt starts and stops, and ease into acceleration gradually. Allowing the transmission to shift smoothly, without forceful downshifts, will also contribute to improved MPG.

Tire pressure plays a critical role in fuel efficiency. Ensure your Enclave’s tires are inflated to the recommended pressure, typically found on a sticker inside the driver’s side doorjamb. Underinflated tires create more rolling resistance, forcing the engine to work harder and consuming more fuel. Check tire pressure regularly, especially during temperature changes, as pressure can fluctuate.

Minimize unnecessary weight. Carrying extra cargo in the Enclave adds load to the engine and reduces fuel economy. Remove any items from the vehicle that are not essential for your trip. Cleaning out the trunk and removing unused roof racks can make a noticeable difference, particularly on longer drives.

Plan your routes strategically. Avoiding congested areas and stop-and-go traffic can significantly improve fuel economy. Use navigation apps to identify the most efficient routes, even if they are slightly longer in distance. Cruising at a consistent speed on the highway is far more fuel-efficient than repeatedly accelerating and braking in city traffic.

Proper maintenance is important. A well-maintained engine operates more efficiently. Follow the recommended maintenance schedule for oil changes, air filter replacements, and spark plug replacements. Addressing minor issues promptly can prevent them from escalating into larger, more fuel-intensive problems.