21 MPG combined isn’t going to win any eco-awards, but for the 2018 Buick Enclave FWD with the 3.6L V6, it’s an acceptable compromise. This isn’t a vehicle purchased by hypermilers, but rather by families who prioritize space, comfort, and a touch of understated luxury. They need three rows of seating, a quiet cabin, and a smooth ride, and they’re willing to trade a few MPGs to get it.

City and highway performance

The EPA estimates suggest 18 MPG in the city and 26 MPG on the highway for this particular Enclave configuration. The disparity is fairly typical for a vehicle of this size and weight, as stop-and-go city driving heavily taxes the 3.6L V6. The 9-speed automatic transmission aims to keep the engine in its most efficient range, even at lower speeds, but physics still come into play with a vehicle tipping the scales at over 4,300 pounds. On the open road, the Enclave’s aerodynamic shape and the transmission’s ability to cruise in higher gears contribute to the more favorable highway figure. Many drivers report that these numbers are achievable with mindful driving.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,100 for the 2018 Buick Enclave FWD 3.6L. This figure is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. Of course, your actual fuel costs will vary depending on your driving habits, the type of driving you do (city vs. highway), and the price of gasoline in your area. Aggressive acceleration and frequent hard braking will reduce your MPG, while consistent highway driving at moderate speeds will improve it.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy can vary significantly. Many Enclave owners report numbers close to the EPA estimates, especially on longer trips. However, those who primarily drive in congested urban environments often see figures closer to 16-17 MPG. Keep in mind that factors such as tire pressure, vehicle maintenance, and even the use of accessories like air conditioning can impact fuel consumption. Treat the EPA figures as a guide, but anticipate some deviation based on your individual circumstances. Check ENCLAVE MPG across all years.

How it compares

Compared to its competitors, the 2018 Buick Enclave’s fuel economy lands in the middle of the pack. The Chevrolet Traverse, which shares the same platform and engine, achieves similar numbers. The Honda Pilot, often praised for its reliability, typically delivers around 20 MPG combined in its FWD configuration. The Toyota Highlander V6, another popular choice, manages slightly better, hovering around 22 MPG combined. However, luxury-oriented rivals like the Acura MDX with SH-AWD often see slightly lower MPG in real-world use, which means that buyers accept the tradeoff for improved traction. Buyers who value practicality may tolerate a slight MPG penalty to get the Enclave’s extra space and features. For all Buick models, check all Buick fuel economy data.

Tips to maximize efficiency

The 3.6L V6 in the Buick Enclave is a smooth and responsive engine, but it does require a measured approach to get the best fuel economy. Avoid aggressive acceleration and hard braking, as these actions consume significantly more fuel. Anticipating traffic flow and maintaining a steady speed will help the engine operate more efficiently.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which in turn reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure listed on the driver’s side door jamb. Correct tire inflation can improve gas mileage by up to 3%.

Reduce unnecessary weight in the vehicle. The heavier the vehicle, the more fuel it consumes. Remove any items you don’t need from the trunk or cargo area. Every extra 100 pounds decreases MPG by about 1%.

Consider using cruise control on highway drives. Maintaining a consistent speed minimizes fluctuations in fuel consumption. However, be mindful of terrain changes and traffic conditions, as cruise control may not always be the most efficient option in hilly areas or heavy traffic.

Keep up with regular maintenance. A well-maintained engine runs more efficiently. Follow the manufacturer’s recommended service schedule, including oil changes, air filter replacements, and spark plug replacements. Routine maintenance can significantly improve fuel economy and extend the life of your vehicle.