20 MPG combined isn’t going to win any fuel efficiency awards, but the 2018 Genesis G80 AWD with the 3.8-liter V6 wasn’t designed to chase economy records. This car offers luxury, space, and confident all-wheel drive, and Genesis knows its customers prioritize these aspects over Prius-like fuel consumption. These buyers are often professionals or established families who value a comfortable and reliable vehicle with understated elegance, and they’re willing to accept a middling fuel bill to get it.

City and highway performance

The EPA estimates that the G80 AWD 3.8L achieves 18 MPG in the city and 25 MPG on the highway. The city figure reflects the demands placed on the engine and transmission during stop-and-go traffic, where the G80’s substantial weight and all-wheel-drive system contribute to increased fuel consumption. The highway number, however, is more reasonable, showcasing the efficiency of the eight-speed automatic transmission at maintaining lower engine speeds over long distances. This difference highlights situations where the G80’s fuel efficiency is more noticeably affected.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2018 Genesis G80 AWD 3.8L at $2,200. This figure is based on driving 15,000 miles per year, with a specific percentage of those miles driven in the city versus highway, and assumes national average fuel prices. This is a helpful benchmark for comparing the G80’s fuel expense to other vehicles in its class. However, your actual fuel costs will vary depending on driving habits, local fuel prices, and the type of fuel you purchase.

Real-world expectations

While the EPA provides a standardized measure, real-world fuel economy often varies. Some drivers have said they achieve figures close to the EPA estimates on the highway, sometimes even exceeding them with careful driving. However, consistent city driving, especially in congested areas, will likely result in lower MPG than the official rating. Factors such as aggressive acceleration, frequent braking, and idling can significantly impact fuel consumption, impacting the overall mileage achieved.

How it compares

When comparing the 2018 Genesis G80 AWD 3.8L to its competitors, fuel economy variations become evident. The Lexus GS 350 AWD, for example, achieves a slightly better 22 MPG combined. The BMW 540i xDrive, with its turbocharged engine, boasts a combined MPG of 23. These differences, while seemingly small, can add up over the lifespan of the vehicle. However, the G80 often presents a more compelling value, offering similar levels of luxury and features at a lower price point than its European rivals. This is a key consideration for buyers who are willing to sacrifice a few miles per gallon for significant cost savings. See all all Genesis fuel economy data here.

Tips to maximize efficiency

The 3.8-liter V6 is smooth and responsive, but try to avoid aggressive acceleration for maximum fuel efficiency. Quick bursts of speed dramatically impact fuel consumption. Gradual acceleration allows the engine and transmission to operate more efficiently, reducing fuel waste. Use the cruise control when on the highway to avoid unintended speed fluctuations and fuel-wasting acceleration.

Check tire pressure regularly to ensure it matches the recommended level listed on the driver’s side doorjamb. Improperly inflated tires increase rolling resistance, which forces the engine to work harder and consume more fuel. Keeping tires properly inflated can improve fuel economy by a measurable amount. Regular servicing also helps maintain top fuel efficiency. Ensure spark plugs, air filters, and other components are replaced according to the manufacturer’s recommended schedule.

Reduce unnecessary weight in the vehicle. Excess cargo adds to the vehicle’s overall weight, impacting fuel economy. Removing items you don’t need can improve your MPG, especially around town where stop and start acceleration is common. Consider using the G80’s drive mode selector. Eco mode will prioritize fuel efficiency by adjusting throttle response and shift points. It’s excellent for city streets or cruising on steady state highways.

Avoid excessive idling. If you anticipate being stopped for more than a minute, it’s more fuel-efficient to turn off the engine. Modern engines are designed to restart quickly and easily, making this a practical way to save fuel. Staying on top of maintenance for your 2018 Genesis G80 is critical to preserving its fuel efficiency, and you can compare G80 MPG across all years.