The 2020 Buick Enclave AWD 3.6L 6-cyl achieves 20 MPG combined, a figure that’s average for its class. Nobody buys an Enclave for best-in-class fuel economy. They buy it for its spacious interior, comfortable ride, and well-appointed cabin. The AWD version suits buyers in colder areas or those who occasionally need extra traction, and they’re likely willing to trade a few MPG for that added security.

City and highway performance

The Enclave’s official EPA ratings are 17 MPG in the city and 25 MPG on the highway. The city figure reflects the Enclave’s weight (around 4,700 pounds) and the demands of stop-and-go driving. The 25 MPG highway number is more respectable and represents the best-case scenario for fuel consumption in this vehicle. A smooth, steady cruise on level ground will get you closer to that figure than aggressive acceleration or hilly terrain. The curb weight is a factor in the MPG. It takes a lot of energy to move that mass. The nine-speed automatic transmission does its job of keeping the engine at the peak of its torque curve, but this family-sized SUV isn’t very efficient.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Buick Enclave AWD is $2,200. This is based on driving 15,000 miles per year and using national average fuel prices, at the time the EPA made its calculations. Your actual fuel costs might vary depending on how many miles you drive and where you live, as fuel prices fluctuate regionally. Drivers who regularly log long highway miles will likely see a lower annual cost than those who primarily drive in the city, while buyers that live in areas with high gas prices will inevitably spend more at the pump.

Real-world expectations

While the EPA estimates provide a standardized benchmark, your real-world fuel economy will likely differ. How you drive, the conditions you encounter, and even the maintenance of your vehicle all play a role. Aggressive acceleration, frequent hard braking, and neglecting routine maintenance can all negatively impact your MPG. Similarly, carrying excess weight, winter driving, and lots of short trips can lower your fuel economy. Drivers who drive smoothly and consistently and adhere to the manufacturer’s maintenance schedule will likely see numbers closer to the EPA estimates.

How it compares

The Enclave’s fuel economy is competitive, though not class-leading. For instance, the Honda Pilot, in its AWD configuration, typically achieves around 19 MPG combined. The Toyota Highlander AWD, with its V6 engine, is usually rated around 22 MPG combined. The Acura MDX, a more luxurious competitor using premium fuel, has similar EPA ratings. If better fuel economy is a top priority, the Highlander Hybrid is rated much higher, at 35 MPG combined, but it comes with a different driving experience. For those interested in the broader picture, all Buick fuel economy data can offer further comparisons. And for those solely interested in MPG for this specific vehicle, this might be useful: ENCLAVE MPG across all years.

Tips to maximize efficiency

Avoid aggressive acceleration. The Enclave is not a sports car, and pressing hard on the accelerator will only waste fuel. Gentle acceleration allows the transmission to shift smoothly and keeps the engine in its most efficient operating range.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, which makes the engine work harder and reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure listed on the tire placard, typically found on the driver’s side doorjamb.

Minimize idling. Idling consumes fuel without covering any distance. If you’re stopped for more than a minute, it’s generally more efficient to turn off the engine. Modern engines are designed to handle frequent starts and stops without excessive wear.

Use cruise control on the highway. Cruise control helps maintain a consistent speed, which can improve fuel economy. Avoid sudden bursts of acceleration or deceleration, as these actions waste fuel. Anticipate changes in traffic and adjust your speed gradually.

Keep up with routine maintenance. A well-maintained engine operates more efficiently. Follow the manufacturer’s recommended maintenance schedule, including oil changes, air filter replacements, and spark plug replacements.