The 2021 Genesis G90 RWD with the 5.0L V8 gets 19 MPG combined. This isn’t a misprint, and it’s also not a dealbreaker for the G90’s target audience. This flagship sedan prioritizes a smooth, powerful driving experience and luxurious comfort above all else. Fuel efficiency comes second, or maybe even third, to these core tenets. The G90 buyer is often a successful entrepreneur, a seasoned executive, or someone accustomed to a higher level of pampering. They appreciate the value Genesis offers , a supremely well-equipped luxury sedan at a price point significantly below its European and Japanese rivals, and are willing to accept a less-than-stellar MPG figure as part of that equation.

City and highway performance

The EPA’s breakdown shows the G90 5.0L RWD achieves 16 MPG in city driving and 24 MPG on the highway. The city figure reflects the realities of stop-and-go traffic, where the large-displacement V8 is working harder to get the heavy G90 moving from a standstill. The highway number is more respectable, though still not class-leading. The G90’s smooth-shifting 8-speed automatic transmission helps to optimize fuel consumption at cruising speeds, but the engine’s sheer size dictates that it requires a significant amount of fuel to maintain momentum. Consider these numbers a reflection of the vehicle’s considerable power and weight, rather than simply inefficiency.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2021 Genesis G90 5.0L RWD is estimated at exactly $3,050. This figure is based on driving 15,000 miles per year and using national average fuel prices. It’s important to remember that this is just an estimate, and your actual fuel costs may vary depending on your driving habits, the type of fuel you use, and where you live. Those primarily driving in the city can expect to exceed this figure, and those who drive fewer than 15,000 miles and who use premium fuel may spend less.

Real-world expectations

While EPA estimates provide a useful benchmark, real-world fuel economy can deviate. G90 drivers who enjoy the engine’s effortless power and engage in frequent bursts of acceleration will likely see lower numbers. Conversely, those who adopt gentler driving habits and primarily use the G90 for long highway journeys may be able to achieve figures closer to, or even slightly exceeding, the EPA’s highway estimate. Remember factors like tire pressure, vehicle maintenance, and the use of accessories like air conditioning can also impact fuel economy.

How it compares

Compared to its rivals, the 2021 Genesis G90 5.0L RWD lags in fuel economy. For example, the BMW 740i RWD, with its turbocharged inline-six engine, achieves an EPA-estimated 22 MPG combined. The Mercedes-Benz S500 4MATIC, using a mild-hybrid inline-six, manages around 24 MPG combined. Even the Lexus LS 500 RWD, known for its refinement, achieves a slightly better 22 MPG combined. The Cadillac CT6, now discontinued, was also more efficient in V6 form. This comparison highlights the G90’s trade-off: V8 power and value come at the expense of fuel efficiency. Potential buyers must weigh these factors against their priorities. You can review G90 MPG across all years to see how efficiency has changed over time. For an overview, explore all Genesis fuel economy data.

Tips to maximize efficiency

The first step is to adopt a more relaxed driving style. Avoid aggressive acceleration and braking, as these actions consume significantly more fuel, especially with a large V8 engine. Anticipate traffic flow and maintain a steady speed whenever possible. Use cruise control on the highway to optimize fuel consumption.

Regular maintenance is critical. Ensure your G90’s tires are properly inflated, as underinflated tires increase rolling resistance and reduce fuel economy. Schedule routine servicing, including oil changes and air filter replacements, to keep the engine running efficiently. Modern engines are very sensitive to neglect and will penalize poor maintenance.

Minimize idling. If you’re stopped for more than a minute or two, turn off the engine. Modern vehicles are designed to restart quickly and efficiently, and idling consumes fuel without providing any benefit. It’s particularly wasteful in the G90, given its V8 engine.

Reduce unnecessary weight. Remove any excess items from the trunk and passenger compartment, as every extra pound reduces fuel economy. This is especially important for a large sedan that already has a higher curb weight. A clean and organized car is also a lighter, more efficient car.

Consider using the G90’s drive modes. Use the “Eco” mode when appropriate, as it adjusts engine and transmission settings to prioritize fuel efficiency. While it may slightly reduce performance, it can make a noticeable difference in fuel consumption, particularly during city driving.