19 MPG combined won’t impress any Prius drivers, but it’s the cost for those seeking the opulent comfort and effortless V8 power that defines the 2019 Genesis G90 RWD with the 5.0L engine. No one chooses this flagship sedan for its fuel efficiency; they select it for its supremely smooth ride, generously appointed cabin, and understated elegance. The G90 buyer prioritizes a sanctuary of tranquility over squeezing every last mile from a gallon of fuel.

City and highway performance

The EPA estimates that the 2019 Genesis G90 RWD 5.0L will achieve 16 MPG in city driving and 24 MPG on the highway. The city figure reflects the fuel-thirsty nature of a naturally aspirated V8 engine navigating stop-and-go traffic.

The highway figure, while better, still lags behind turbocharged six-cylinder competitors. The eight-speed automatic transmission helps optimize fuel economy at cruising speeds, but the engine’s displacement ultimately dictates its consumption. These numbers are not unexpected for a large, luxurious sedan, and are generally considered acceptable by those seeking a quiet and comfortable ride.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Genesis G90 RWD 5.0L at $3,050. This figure is based on driving 15,000 miles per year and using the national average fuel price. Keep in mind that this is an estimate; your actual fuel costs will vary depending on your driving habits, local fuel prices, and the type of fuel you use. Premium fuel is recommended to maximize this engine’s performance and longevity, which further increases the annual cost.

Real-world expectations

While the EPA provides a standardized estimate, real-world MPG can vary significantly. Aggressive acceleration, frequent short trips, and neglecting routine maintenance can all negatively impact fuel economy. Conversely, gentle driving habits, consistent highway cruising, and ensuring proper tire inflation can help you approach or even slightly exceed the EPA estimates. The G90’s curb weight of over 4,600 pounds also contributes to its fuel consumption, especially during acceleration from a standstill.

Drivers who spend most of their time in urban environments are likely to see fuel economy closer to the 16 MPG city rating, while those who primarily drive on the highway may get closer to the 24 MPG highway number. It’s crucial to understand that the G90 5.0L is designed for refined power, not ultimate efficiency.

How it compares

Compared to its competitors, the 2019 Genesis G90 RWD 5.0L’s fuel economy is on the lower end. The Mercedes-Benz S560, with its 4.0L twin-turbo V8, achieves a slightly better 17 MPG city/27 MPG highway, illustrating the efficiency benefits of forced induction. Similarly, the BMW 750i xDrive, powered by a 4.4L twin-turbo V8, also manages 17 MPG city/25 MPG highway. Even the Lexus LS 500, while offering a V6 engine, gets a comparable 19 MPG city/30 MPG highway. This comparison highlights the G90 5.0L’s relatively lower fuel economy compared to its rivals. However, the G90 often comes with a lower price tag, which partially offsets the higher fuel costs. For those prioritizing fuel efficiency, the G90 is also available with a 3.3L twin-turbo V6, which delivers improved fuel economy. See G90 MPG across all years for a detailed look.

Tips to maximize efficiency

Avoid aggressive acceleration. The G90 5.0L has ample power, but rapid acceleration consumes significantly more fuel. Smooth, gradual acceleration will not only improve your fuel economy but will also enhance the overall relaxing driving experience the G90 is designed to deliver.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the manufacturer’s recommended pressure, found on the sticker inside the driver’s side doorjamb. This simple task can make a noticeable difference over time.

Minimize idling. Excessive idling wastes fuel. If you anticipate being stationary for more than a minute, turn off the engine. This is particularly relevant in city driving where traffic delays are common.

Use cruise control on the highway. Maintaining a consistent speed on the highway optimizes fuel economy. Cruise control helps prevent unnecessary speed fluctuations, leading to better fuel efficiency. Cruise control also reduces driver fatigue when travelling long distances.

Keep up with scheduled maintenance. Regular maintenance, including oil changes and air filter replacements, ensures that the engine is running efficiently. A well-maintained engine consumes less fuel and operates more reliably. More all Genesis fuel economy data is available online.