20 MPG combined won’t win any hypermiling contests, but it’s what you can expect from the 2019 Genesis G80 AWD with the 3.8L V6. This car isn’t about Prius-like efficiency; it’s about a smooth, composed ride, a luxurious interior, and a comfortable ownership experience from a brand that aims to redefine value in the premium segment. The G80 buyer understands and accepts this trade-off.

City and highway performance

The EPA estimates 18 MPG in the city and 24 MPG on the highway for this G80 configuration. The city figure reflects stop-and-go traffic, where the engine works harder to accelerate the nearly 4,300-pound sedan. The eight-speed automatic transmission finds the right gear, but the engine needs to exert considerable effort. On the highway, the G80 cruises more quietly benefiting from less frequent acceleration and a taller top gear, which slightly improves fuel economy. Aggressive driving, even on the highway, will reduce these numbers.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,200 for the 2019 Genesis G80 AWD 3.8L. This is based on driving 15,000 miles per year and using national average fuel prices. Your actual fuel costs may vary depending on your driving, city versus highway driving, and local gas prices. Someone who drives short distances in urban areas will likely see a higher annual fuel cost than someone who mainly does highway driving. This estimate also assumes regular gasoline, which Genesis recommends for this engine.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy often differs. Some owners report figures close to the EPA estimates, with slightly better highway mileage on long trips. However, hard driving, frequent use of Sport mode, or consistent heavy traffic will lower fuel economy. The all-wheel-drive system provides enhanced traction and stability, but it also adds weight and drivetrain losses that slightly reduce fuel efficiency compared to the rear-wheel-drive version. Driving style and terrain also affect fuel average.

How it compares

The G80’s fuel economy is similar to its competitors. A 2019 BMW 540i xDrive, with its turbocharged inline-six, gets an EPA-estimated 24 MPG combined, an advantage. The Mercedes-Benz E 450 4MATIC, also with a turbocharged six, gets around 23 MPG combined. The Lexus GS 350 AWD comes in at around 22 MPG combined. These differences can add up and influence a buyer choosing between these vehicles. See G80 MPG across all years for a wider comparison. Buyers in this segment want competitive numbers, even if they are primarily focused on other features than fuel efficiency.

Tips to maximize efficiency

Use the “Eco” driving mode when possible. It might slightly reduce throttle response and adjust shift points, but it optimizes the engine and transmission for fuel efficiency without sacrificing comfort. This encourages relaxed driving, which means less gas, especially during commutes.

Ensure your tires are properly inflated and aligned. Underinflated tires increase rolling resistance, forcing the engine to work harder and wasting gas. Regular tire pressure checks make for better fuel economy and extend tire life. Alignment is also critical, reducing drag and promoting even tire wear.

Minimize idling. Modern engines do not require extended warm-up periods. Idling burns gas unnecessarily and makes for poorer fuel economy. If you anticipate being stopped for more than a minute, turn off the engine safely.

Avoid aggressive acceleration and braking. Smooth inputs conserve fuel. Slamming on the accelerator and then braking hard wastes energy and strains the drivetrain. Anticipate traffic flow and maintain a consistent speed whenever possible.

Keep up with scheduled maintenance. A well-maintained engine runs more efficiently. Regular oil changes, air filter replacements, and tune-ups ensure that all components work well, improving fuel economy and extending the life of your vehicle. Refer to all Genesis fuel economy data for a look at the broader lineup and their efficiency ratings.