18 MPG combined. That figure might raise eyebrows in today’s world of hybrid SUVs and electric sedans. However, for the 2017 Genesis G90 AWD 5.0L, it’s the price of admission to a world of handcrafted luxury, effortless V8 power, and quiet isolation from the outside world. This isn’t a car purchased by penny-pinchers; it’s a statement of success, a comfortable ride for executives and those who prioritize space and smoothness above all else.

City and highway performance

The EPA estimates the G90’s city fuel economy at 15 MPG. This reflects the realities of stop-and-go traffic where the large displacement V8 works harder to get the heavy sedan moving.

Highway driving fares better, with an EPA-rated 23 MPG. While not stellar, this highway figure allows for reasonable range on long road trips. The eight-speed automatic transmission, while smooth and responsive, doesn’t prioritize fuel saving above all else; rather it focuses on providing the appropriate power band for the engine’s character, delivering relaxed cruising and immediate power when needed.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2017 Genesis G90 AWD 5.0L at exactly $3,200. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices.

Remember that this is just an estimate, and your actual fuel costs will vary depending on your driving habits, location, and the prevailing price of gasoline. However, it provides a useful benchmark for understanding the ongoing expense of owning and operating this particular model.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy often differs. Drivers who frequently use the G90’s abundant power will likely see figures below the EPA estimates. Conversely, those who adopt a more relaxed driving style and prioritize smooth acceleration may achieve numbers closer to, or even slightly exceeding, the official figures. The type of roads you typically drive on also plays a factor.

Sustained highway cruising at consistent speeds will yield better results than navigating congested city streets with frequent stops and starts. Owners should also remember that premium fuel is recommended for optimal performance, adding to the overall cost of operation.

How it compares

Compared to its contemporaries, the 2017 Genesis G90 AWD 5.0L’s fuel economy sits squarely where you’d expect for a large, powerful luxury sedan. The BMW 750i xDrive, with its 4.4L V8, achieves roughly similar numbers: an EPA-estimated 17 MPG combined. The Mercedes-Benz S550 4MATIC, also packing a V8, lands in a similar range. Even the Lexus LS 460 AWD, known for its refinement, only manages around 18 MPG combined.

These competing vehicles highlight that the Genesis G90’s fuel consumption is primarily a function of its size, weight, and powertrain, not necessarily an indication of poor engineering. Those seeking better fuel efficiency in the luxury segment might consider options like the Lexus ES 300h hybrid (44 MPG combined), but they should understand that they are sacrificing a significant amount of power, interior space, and overall luxury experience in the process. You can review G90 MPG across all years to help compare.

Tips to maximize efficiency

Use the G90’s driving mode selector. The “Eco” mode recalibrates the throttle response and transmission shift points to prioritize fuel efficiency. While it might slightly reduce the immediate responsiveness of the 5.0L V8, it can contribute to a noticeable improvement in fuel economy, especially during city driving. Learn more about all Genesis fuel economy data.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder and consumes more fuel. Regularly check your tire pressure and maintain it at the recommended level listed on the driver’s side doorjamb.

Avoid aggressive acceleration and braking. The G90’s powerful engine can easily propel you forward with a surge of power, but doing so frequently will significantly impact fuel economy. Anticipate traffic flow and accelerate and brake smoothly to conserve fuel. Gentle acceleration, even from a stop, can make a measurable difference over time.

Minimize idling. If you anticipate being stopped for more than a minute, turn off the engine. Modern engines are designed to restart quickly and efficiently, and idling consumes fuel without moving the vehicle.

Keep up with routine maintenance. A well-maintained engine operates more efficiently. Follow the manufacturer’s recommended maintenance schedule, including regular oil changes, air filter replacements, and spark plug inspections. A properly tuned engine will deliver optimal performance and fuel economy.