19 MPG combined is the fuel economy for the 2019 Infiniti Q70 5.6L. It’s a figure that won’t win any awards for lower fuel costs, but it’s what you get for the strong power delivered by its naturally aspirated V8 engine. Buyers of this particular Q70 don’t prioritize fuel efficiency above all else. They’re after a blend of luxury, performance, and understated style, and they understand that a powerful V8 costs more at the pump.

City and highway performance

The EPA estimates for the 2019 Q70 5.6L are 16 MPG in the city and 24 MPG on the highway. The city figure reflects the engine’s thirst during stop-and-go driving, where its displacement and lack of hybrid assistance become apparent. The highway number is better. During steady cruising, the Q70’s automatic transmission settles into a more efficient gear, allowing for reasonable fuel consumption on road trips, though still not the best in its class.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2019 Infiniti Q70 5.6L at $3,050. This figure is based on driving 15,000 miles per year and using national average fuel prices. Individual spending will change depending on where you live, how often you drive, and how heavy your foot is. However, $3,050 provides a standard way to compare the Q70’s fuel consumption against other vehicles, giving potential buyers insight into the year-over-year costs.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy often changes. Driving style can heavily influence the Q70 5.6L’s fuel economy. Aggressive acceleration and frequent hard braking will decrease fuel mileage, pushing it below the EPA estimates. However, a driver with a light foot who anticipates traffic and avoids unnecessary idling might see figures closer to, or even slightly above, the EPA’s combined rating. Terrain also plays a role, hilly areas will generally decrease fuel economy compared to flat highways.

How it compares

The 2019 Infiniti Q70 5.6L’s fuel economy is in the middle for similar-sized luxury sedans with V8 engines. For instance, the Lexus GS 350 (non-F Sport) gets 23 MPG combined, offering a slightly more frugal option. A BMW 540i xDrive achieves approximately 24 MPG combined, and the Mercedes-Benz E450 4MATIC is in a similar range. The Q70’s numbers indicate a car made for power and feel over maximum frugality. Buyers considering the 5.6L Q70 might also assess Q70 MPG across all years to understand the fuel economy.

Tips to maximize efficiency

Drive smoothly and consistently. Avoid abrupt acceleration and hard braking, as these actions consume more gas. Anticipate traffic flow and maintain a steady speed when possible.

Make sure your Q70’s tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressure regularly and inflate them to the manufacturer’s recommended specifications, found on the sticker inside the driver’s side doorjamb.

Minimize idling. If you anticipate being stopped for more than a minute, turn off the engine. Modern cars, including the Q70, restart quickly and efficiently, saving fuel that would otherwise be wasted while idling.

Use cruise control on the highway. Maintaining a consistent speed with cruise control helps optimize fuel consumption, but be mindful of terrain and traffic conditions and adjust your speed accordingly.

Consider using a lighter-weight synthetic motor oil for your next oil change. This can slightly reduce internal engine friction and improve fuel economy. Check your owner’s manual for the recommended oil viscosity.

Regular maintenance is important for fuel economy. Replace air filters and spark plugs as needed per the manufacturer’s maintenance schedule in the owner’s manual. A poorly maintained engine won’t give the driver the best fuel economy or performance. For a broader perspective on the Infiniti brand, consult all Infiniti fuel economy data.