The 2018 Infiniti Q70 with the 5.6L V8 gets 19 MPG combined. This car isn’t bought by those prioritizing lower fuel costs. Instead, it’s chosen for its powerful engine, rear-wheel-drive dynamics (all-wheel drive is optional), luxurious appointments, and an understated presence that separates it from German alternatives. Buyers accept the fuel costs because they value the Q70’s unique blend of performance and luxury.

City and highway performance

The EPA estimates the Q70 V8 at 16 MPG in the city and 24 MPG on the highway. The city figure reflects the engine’s displacement and the seven-speed automatic transmission’s programming, which favors responsiveness over fuel efficiency in stop-and-go traffic. The highway number, while better, still trails competitors due to the Q70’s older platform and focus on effortless cruising power.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Infiniti Q70 5.6L at $3,050. This figure is based on driving 15,000 miles per year and assumes fuel prices at the national average. Factors that could increase this cost include aggressive driving, frequent short trips in cold weather (which reduces MPG), and using premium fuel, which is recommended for optimal performance in the Q70’s V8.

Real-world expectations

The EPA estimates provide a baseline, and your actual fuel economy will vary. Expect the 16 MPG city figure to be fairly accurate if you live in an area with heavy congestion. On the highway, achieving 24 MPG is possible with steady-state cruising, but aggressive acceleration or higher speeds will quickly diminish your fuel economy. Owners often see blended figures in the 17-21 MPG range on fuel tracking apps, leaning towards the lower end of that spectrum for those who enjoy the V8’s power.

How it compares

The Q70 5.6L’s fuel economy lags behind many of its competitors. Consider the BMW 540i, which achieves 25 MPG combined from its turbocharged inline-six. Even the V8-powered Lexus GS F manages a slightly better 19 MPG combined. The Mercedes-Benz E450, with its turbocharged inline-six, gets 26 MPG combined. These differences, while seemingly small on paper, can translate into significant savings over the lifespan of the vehicle. Of course, none of those options replicate the specific character of the Q70, which might make the difference in fuel economy acceptable to its target buyer. For a broader look at the brand, research all Infiniti fuel economy data. If you are still shopping for the right Q70 for you, be sure to review Q70 MPG across all years to ensure the best match between features and efficiency.

Tips to maximize efficiency

Use the Q70’s Drive Mode Selector. Switching to “Eco” mode will dull throttle response and encourage earlier upshifts, potentially squeezing out an extra mile or two per gallon in city driving. While it might slightly diminish the fun factor, it’s a suitable option for mundane commutes when performance isn’t a priority.

Maintain proper tire inflation. The Q70’s recommended tire pressure is listed on a sticker inside the driver’s side doorjamb. Underinflated tires increase rolling resistance and reduce fuel efficiency. Regularly checking and correcting tire pressure, especially during temperature changes, can make a noticeable difference.

Anticipate traffic flow to avoid unnecessary braking and acceleration. The Q70’s powerful V8 is quick to deliver impressive power, which can encourage aggressive driving. Smooth, controlled driving not only improves fuel economy but also enhances the overall driving experience.

Minimize idling. The Q70’s V8 burns a significant amount of fuel while idling. Avoid extended periods of idling, especially when waiting for someone or in drive-through lines. Turning off the engine, even for short periods, can save fuel over time.