22 MPG combined isn’t a great number, but it’s what you can expect from the 2018 Buick Regal AWD with the 3.6L V6. This isn’t a Prius competitor; it’s a comfortable, reasonably sporty sedan with all-wheel drive and a smooth, powerful engine. Buyers choose this Regal for its combination of features, not low fuel use. They’re often suburban professionals, empty nesters, or families needing a practical yet refined vehicle that can handle varied weather conditions without sacrificing driving enjoyment. Fuel economy is a consideration, but rarely the main reason to buy.

City and highway performance

The EPA estimates the 2018 Buick Regal AWD at 19 MPG in the city and 27 MPG on the highway. The city number reflects the inefficiency of stop-and-go driving. The all-wheel drive system makes it worse by adding weight and drag. The highway number is better, thanks to the nine-speed automatic transmission allowing the engine to cruise at lower RPMs. However, aggressive acceleration or higher speeds will quickly reduce that 27 MPG figure. These ratings are realistic for typical driving, but drivers who accelerate quickly will see lower numbers.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2018 Buick Regal AWD 3.6L at exactly $2,000. This figure is based on driving 15,000 miles per year and using national average fuel prices. Individual costs will vary depending on local fuel prices and driving habits. Someone who primarily drives short distances in the city will likely exceed this estimate, while someone who does mostly highway driving might spend less. The $2,000 figure provides a standardized way to compare fuel costs across different vehicles, but each driver should adjust based on their specific circumstances.

Real-world expectations

While the EPA figures provide a useful comparison point, real-world fuel economy often differs. If you drive conservatively, expect to see numbers within a few MPG of the official ratings. However, aggressive driving, heavy traffic, and extreme weather conditions can all negatively impact fuel efficiency. Many owners average around 20-24 MPG in mixed driving. Consider these factors and understand that the EPA numbers are just estimates, not guarantees. Those interested in seeing all Buick fuel economy data may want to explore other options.

How it compares

Compared to competitors, the 2018 Buick Regal AWD sits in the middle. The Acura TLX SH-AWD with the 3.5L V6 achieves a similar 23 MPG combined, while offering a slightly more engaging driving experience. The Nissan Altima with all-wheel drive, available on the 2.5L engine is a more fuel-efficient sedan than the Regal, offering up to 30 MPG combined. The Subaru Legacy 3.6R, another all-wheel-drive sedan, delivers comparable overall efficiency. For a more efficient alternative, the front-wheel-drive Regal Sportback with the 2.0L turbo engine offers significantly better MPG, even though it sacrifices some of the V6’s power and smoothness. Someone considering the Regal may want to compare the REGAL MPG across all years to inform their decision.

Tips to maximize efficiency

Gentle acceleration is key. The 3.6L V6 is responsive, but using that power frequently will quickly burn fuel. Minimize hard starts and stops. Instead, anticipate traffic flow and maintain a smooth, consistent speed. Avoid unnecessary idling, as this burns fuel without covering any distance. Even a few minutes of idling here and there can add up over time.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, reducing fuel economy. Check your tire pressure regularly and inflate them to the recommended level, typically found on a sticker inside the driver’s side door or in the owner’s manual. Using the correct grade of gasoline can also make a difference.

Reduce your vehicle’s weight. Carrying unnecessary items in your trunk or back seat adds weight, which decreases fuel efficiency. Declutter your vehicle regularly. A lighter vehicle will always be more efficient than a heavier one.

Take advantage of the Regal’s cruise control on the highway. Maintaining a consistent speed reduces fluctuations in fuel consumption and can improve your overall efficiency. This is especially helpful on long trips.

If equipped, consider using the “Eco” or “Touring” mode. Many modern vehicles have multiple driving modes that optimize the engine and transmission for fuel efficiency. While it might slightly reduce performance, it can make a noticeable difference in MPG over the long term.