21 MPG combined in the 2021 Genesis G80 AWD with the 3.5L V6 won’t win any hypermiling contests, but it’s a calculated trade-off. The G80 isn’t about squeezing every last drop from the fuel tank; it’s about delivering a supremely comfortable and stylish driving experience with plentiful power and all-weather confidence. The G80 buyer appreciates refinement and value, understanding that impeccable build quality and a long list of standard features come at a cost, in this case, slightly below-average fuel efficiency for the segment.

City and highway performance

The EPA estimates of 18 MPG in the city and 26 MPG on the highway reflect the realities of a turbocharged V6 powering an all-wheel-drive sedan. Stop-and-go traffic exposes the engine’s thirst, while highway cruising benefits from the eight-speed automatic transmission’s ability to keep the engine in its most efficient range. The 3.5L engine provides effortless acceleration, making highway merges and passing maneuvers drama-free. The all-wheel-drive system adds weight and complexity, impacting efficiency but providing added grip and stability in inclement weather conditions that are important to the New England and Midwestern buyers for whom AWD is important.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2021 Genesis G80 AWD 3.5L will be $2,750. This figure is based on driving 15,000 miles per year and using national average fuel prices. Remember that this is an estimate, and your actual fuel costs may vary depending on your driving habits, the type of fuel you use (premium is recommended), and local fuel prices. You can explore all Genesis fuel economy data to see how this model compares to the rest of the lineup.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy often differs. Aggressive driving, frequent short trips, and extended idling can all decrease fuel efficiency. On the other hand, smooth acceleration, consistent highway speeds, and proper tire inflation can help you achieve or even exceed the EPA estimates. The G80’s driving mode selector also plays a role; selecting “Eco” mode can prioritize fuel efficiency by adjusting throttle response and transmission shift points.

How it compares

The G80’s fuel economy lands it squarely in the middle of its competitive set. The BMW 540i xDrive, for example, is rated at 22 MPG combined, offering a slight edge, while the Mercedes-Benz E450 4MATIC achieves a similar 23 MPG. An Audi A6 with the 3.0T engine is in the same ballpark at 24 MPG combined. These small differences may not sway buyers who are more concerned with the G80’s design, its level of standard equipment, and its lower price point compared to its German rivals. The Cadillac CT5-V, while offering more performance, pays the price with a 20 MPG combined rating, further emphasizing the G80’s balanced approach. Those seeking significantly better fuel economy might consider the G80 2.5T RWD, which achieves 25 MPG combined. You can compare G80 MPG across all years to see the variance amongst the lineup.

Tips to maximize efficiency

Take advantage of the G80’s Eco drive mode in low-speed situations. This mode recalibrates the throttle response and shift points to prioritize fuel efficiency, without sacrificing too much responsiveness for everyday driving. It’s a simple way to save fuel without dramatically altering the driving experience.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended levels listed on the sticker inside your driver’s side door. This small adjustment can make a surprising difference.

Avoid aggressive acceleration and braking. The G80’s ample power can be tempting to unleash, but hard acceleration and sudden braking waste fuel. Maintain a smooth and steady pace whenever possible, anticipating traffic flow and avoiding unnecessary bursts of speed. The adaptive cruise control is a helpful tool for consistent highway speeds.

Minimize idling. Letting the engine idle for extended periods consumes fuel without any real benefit, especially in modern vehicles that warm up quickly. If you anticipate being stopped for more than a minute or two, it’s best to turn off the engine. This is particularly relevant in colder climates where owners might be tempted to let the car warm up before driving.

Lighten the load. Carrying unnecessary weight in the vehicle reduces fuel efficiency, as the engine must work harder to move the extra mass. Remove any items from the trunk or rear seats that aren’t essential. Even small amounts of weight add up over time, impacting fuel consumption.