The 2020 Buick Regal Sportback with all-wheel drive and the 3.6L V6 gets 22 MPG combined. It’s not stellar, certainly not class-leading, and frankly, it’s a figure that demands some justification. This isn’t a Prius chaser. The Regal Sportback in this configuration is a spacious, comfortable, and surprisingly agile hatchback that prioritizes all-weather confidence and a smooth, responsive powertrain over hyper-miling achievements. Its buyer likely appreciates the practicality of a large cargo area, the sure-footedness of AWD, and the effortless performance of the V6, accepting the fuel economy as the price.

City and highway performance

The EPA estimates offer a more granular look at the Regal AWD’s fuel consumption. The city rating is 19 MPG. This reflects the engine working harder in stop-and-go traffic, the all-wheel drive system potentially engaging more frequently. This number is reasonable considering the engine size and the presence of AWD, where extra drivetrain components add weight and complexity. On the open road, the Regal fares better, achieving a respectable 27 MPG. The nine-speed automatic transmission undoubtedly helps here, allowing the engine to cruise at lower RPMs for optimized fuel burn during steady-state highway driving.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Buick Regal AWD at $2,000. This figure, as a reminder, is based on driving 15,000 miles per year, with a mix of city and highway driving that reflects the EPA’s standardized testing cycle, and assumptions about national average fuel prices which frequently change. Your actual fuel costs may vary considerably depending on your driving habits, the type of roads you typically drive on, and the prevailing fuel prices in your area. Someone who primarily drives short distances in heavy traffic will likely exceed this annual fuel cost, while someone who primarily takes long highway trips might see a lower figure.

Real-world expectations

While the EPA estimates offer a standardized benchmark, real-world fuel economy often deviates. Drivers who frequently engage the all-wheel drive system in snow or other slippery conditions should expect lower MPG. Aggressive driving, with frequent hard acceleration, will also negatively impact fuel economy. Careful and conservative driving techniques, such as anticipating traffic flow and avoiding sudden acceleration and braking, can help drivers approach or even exceed the EPA’s estimates on occasion. Regular maintenance, including properly inflated tires and timely oil changes, is critical for maintaining optimal fuel efficiency.

How it compares

The 2020 Buick Regal AWD 3.6L exists in a unique space. It’s not quite a traditional sedan, and its hatchback configuration sets it apart from many competitors. A similarly equipped Acura TLX SH-AWD with its 3.5L V6 manages around 24 MPG combined, offering slightly better fuel economy but also a less practical trunk. The Volkswagen Arteon, another hatchback with AWD, typically sees around 25 MPG combined with its 2.0L turbo four-cylinder. This illustrates the premium the Regal buyer is paying for that larger, smooth V6. Drivers who prioritize fuel economy above all else may cross-shop with the Lexus ES 300h hybrid at roughly 44 MPG combined (FWD only), but would thereby give up all-wheel drive and significant cargo space. See all Buick fuel economy data. Also check REGAL MPG across all years. The choice boils down to priorities: fuel savings versus power, cargo capacity, and all-weather capability.

Tips to maximize efficiency

Use the Regal’s cruise control on long highway drives. Maintaining a consistent speed greatly reduces fuel consumption compared to fluctuating speeds, and is especially beneficial on relatively-flat interstates.

Avoid extended idling. The 3.6L V6 consumes a noticeable amount of fuel even when stationary. If you anticipate being stopped for more than a minute or two, switch the car off. Modern starters and ignition systems are designed to handle frequent starts without excessive wear.

Monitor your tire pressure regularly. Under-inflated tires increase rolling resistance, forcing the engine to work harder and reducing fuel economy. Check your tire pressure at least once a month and ensure they are inflated to the recommended pressure listed on the door jamb.

Be mindful of cargo weight. Excess weight in the vehicle puts additional strain on the engine and decreases fuel efficiency. Remove any unnecessary items from the car. The Regal’s ample cargo space can easily accumulate extra stuff, so a periodical clear out is worthwhile.