20 MPG combined won’t win any awards, but for a large, rear-wheel-drive luxury sedan like the 2017 Genesis G90 with the 3.3L twin-turbo V6, it’s a figure many owners are willing to accept. This isn’t a car bought by people hyper-focused on squeezing every last mile from a gallon; it’s a vehicle chosen for its comfort, space, technology, and understated elegance. Fuel economy takes a back seat to these priorities, though it’s still a relevant consideration.

City and highway performance

The EPA estimates break down the G90’s fuel efficiency as 17 MPG in the city and 24 MPG on the highway. The city figure reflects the reality of stop-and-go traffic, where the G90’s weight and the engine’s need to overcome inertia take their toll. The highway MPG is more palatable, as the eight-speed automatic transmission allows the engine to cruise at lower RPMs, improving efficiency. However, even on the highway, enthusiastic use of the twin-turbo V6 for passing or merging will quickly bring that number down.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2017 Genesis G90 RWD 3.3L 6-cyl is $2,900. This calculation is based on driving 15,000 miles per year and using national average fuel prices. Of course, this is just an estimate. Actual fuel costs will vary depending on individual driving habits, local fuel prices, and the type of fuel used. Remember that Genesis recommends premium fuel for optimal performance, which typically costs more than regular unleaded. You can compare the G90 MPG across all years to see any trends.

Real-world expectations

While the EPA numbers provide a baseline, real-world fuel economy often differs. Drivers who spend most of their time in congested urban environments are likely to see figures below the 17 MPG city estimate. Conversely, those who primarily drive on open highways might achieve slightly better than 24 MPG. Driving style plays a significant role; aggressive acceleration and frequent braking will negatively impact fuel efficiency. Also, bear in mind that factors like tire pressure, vehicle maintenance, and even the weather can influence how many miles you get per gallon.

How it compares

Compared to other large luxury sedans with similar powerful engines, the 2017 Genesis G90’s fuel economy is about average for its class. For instance, the comparable BMW 740i with its 3.0L inline-six turbo is rated at 21 MPG combined, providing a small but noticeable advantage. The Mercedes-Benz S450 with its 3.0L inline-six turbo achieves around 22 MPG combined. Meanwhile, the Cadillac CT6 with the 3.6L V6 returns figures similar to the G90’s. The G90 buyer isn’t necessarily cross-shopping solely on fuel economy, but these fractional differences can be a tie-breaker for some. Checking all Genesis fuel economy data reveals that the G90 prioritizes size and power over maximizing MPG.

Tips to maximize efficiency

Smooth and steady acceleration is key to maximizing fuel economy in the G90. Avoid sudden bursts of speed and try to maintain a consistent pace. The twin-turbo V6 is responsive, but resist the urge to constantly tap into its power reserves if you’re prioritizing efficiency. Use cruise control on the highway to maintain a consistent speed and minimize unnecessary acceleration. This can significantly improve your fuel economy on long journeys.

Proper tire inflation is critical for optimizing fuel efficiency. Check your tire pressure regularly and ensure they are inflated to the recommended level, which can be found on the sticker inside the driver’s side doorjamb. Under-inflated tires create more rolling resistance, forcing the engine to work harder and consume more fuel.

Regular maintenance such as oil changes, air filter replacements, and spark plug replacements contributes to optimal engine performance and fuel economy. Following the recommended maintenance schedule in your owner’s manual will help ensure that your G90 is running efficiently.

Minimize unnecessary weight in the vehicle. Remove any items from the trunk or backseat that are not essential. Extra weight puts added strain on the engine, reducing fuel efficiency. Decluttering your G90 can make a small but noticeable difference over time.