The 2017 Infiniti Q70 AWD with the 5.6L V8 gets 18 MPG combined. This isn’t an economy car, so it isn’t for everyone. The Q70 5.6 AWD is for those who want strong performance and all-weather confidence in a luxury sedan, understanding that this impacts fuel economy. This driver probably values the power and refined sound of a naturally aspirated V8 over the sound of a more efficient competitor’s engine.

City and highway performance

The EPA estimates 16 MPG in the city and 23 MPG on the highway for this Q70. Expect the city figure to change significantly based on driving style and traffic. Short trips, fast acceleration, and stop-and-go commutes will lower that number. The highway figure is more attainable if you avoid using the V8’s passing power. Even gentle highway driving won’t make this sedan fuel efficient; the engine size and all-wheel-drive system require more energy.

Annual fuel cost

The EPA estimates an annual fuel cost of $3,200 for the 2017 Infiniti Q70 AWD 5.6L. This is based on driving 15,000 miles per year, with 55% of those miles in the city and 45% on the highway, using the national average fuel price for regular gasoline at the time. Whether this seems high depends on your perspective. Someone who previously drove a hybrid might disagree. A driver trading in a truck might see it as an acceptable tradeoff for V8 power and luxury.

Real-world expectations

While the EPA provides a benchmark, your actual fuel economy will vary. Drivers who like to put their foot down will likely struggle to match the EPA’s combined figure, especially in urban areas. Careful drivers on long highway trips might exceed the 23 MPG highway estimate. The key to better fuel efficiency is to drive smoothly, anticipate traffic, and avoid idling. Also, regularly check your tire pressure, since underinflated tires increase rolling resistance and decrease fuel economy.

How it compares

The Q70 5.6 AWD is in a class where fuel economy is less important than performance and luxury. The BMW 550i xDrive, for example, also offers all-wheel drive and V8 power, but gets slightly better fuel economy at 19 MPG combined. However, its turbocharged delivery is a different experience than the Q70’s naturally aspirated feel. Audi’s A6 3.0T quattro, with its supercharged V6, achieves 24 MPG combined, but lacks the V8 sound of the Infiniti. For those willing to sacrifice some performance, the Q70’s own 3.7L V6 gets around 21 combined MPG, a noticeable improvement. Those searching for Q70 MPG across all years will find a range of options depending on engine and drivetrain. If you’re seeking more efficient options, consider exploring all Infiniti fuel economy data to compare this model with the brand’s other offerings.

Tips to maximize efficiency

The Q70’s transmission offers a “Standard” and “Eco” mode. Select “Eco” mode during regular driving to encourage earlier upshifts and less aggressive throttle response. This can improve fuel economy, particularly in city driving. Switch back to “Standard” mode when you want the V8’s full potential.

Avoid fast acceleration and hard braking. The Q70’s power might tempt you to accelerate quickly, but smooth throttle inputs will reduce fuel consumption. Anticipate traffic conditions and keep a safe following distance to need less braking.

Keep your tires inflated. Check your tire pressure monthly and ensure they are inflated to the recommended pressure on the driver’s side doorjamb. Underinflated tires increase rolling resistance, which reduces fuel economy and tire life.

Minimize idling. Idling consumes fuel. If you’re stopped for more than a minute, turn off the engine. This is important in cities where idling can waste gas more.

Consider reducing your speed on the highway. While the Q70 is comfortable at higher speeds, fuel economy decreases as speed increases. Maintaining a consistent speed within the speed limit will help you get the best highway fuel economy.