18 MPG combined. Let’s be honest, nobody shopping for a 2016 Infiniti Q70 AWD with the 5.6L V8 is prioritizing fuel efficiency. This isn’t a Prius competitor; it’s a luxury sedan designed to deliver effortless acceleration, a refined ride, and a distinctive presence. The fuel consumption is simply the price of admission for buyers who value those attributes above all else.

City and highway performance

The EPA ratings for the Q70 AWD 5.6L break down to 16 MPG in the city and 23 MPG on the highway. The city figure reflects the engine’s thirst during stop-and-go driving, where the car’s substantial weight and the large displacement V8 work against it. The highway number is more respectable, due to the seven-speed automatic transmission’s ability to settle into a fuel-saving overdrive gear at cruising speeds. However, aggressive passing maneuvers or sustained high-speed runs will quickly reduce that highway advantage. The all-wheel-drive system also contributes to the lower MPG numbers, as it adds weight and consumes a small amount of power to operate, even when not actively engaged.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2016 Infiniti Q70 AWD 5.6L is $3,200. This calculation is based on driving 15,000 miles per year, using a national average fuel price. Keep in mind that this figure is just an estimate; individual spending will vary depending on driving habits, local fuel costs (which can fluctuate significantly), and the specific type of fuel used. Premium gasoline is recommended for optimal performance, which directly impacts the cost per gallon, driving up the annual total.

Real-world expectations

Owners of the 2016 Q70 AWD 5.6L often report MPG figures that are close to, or slightly below, the EPA estimates. Drivers who frequently tap into the V8’s power will likely see numbers closer to the low end of the range, while those with a more relaxed driving style and a greater emphasis on highway cruising may achieve figures closer to the EPA’s 23 MPG highway rating. Ultimately, this vehicle prioritizes performance and luxury over outright fuel economy, and real-world MPG will reflect that trade-off.

How it compares

Compared to its competitors, the 2016 Infiniti Q70 AWD 5.6L sits near the bottom of the pack in V8 fuel economy. For instance, the BMW 550i xDrive from the same model year, with its turbocharged V8, achieves EPA ratings of 17 MPG city and 25 MPG highway. The Mercedes-Benz E550 4MATIC, also featuring a V8, posts similar figures around 17 city and 26 highway. Even the larger Lexus GS 450h, a hybrid, gets around 29 MPG combined. The Q70’s numbers are more comparable to larger, less sporty sedans like the Lincoln Continental with its optional 3.0L twin-turbo V6, which comes in around 18 combined. This comparison is important because buyers often cross-shop these models. A driver who values efficiency above all else would likely find the Lexus a more suitable choice. However, for those prioritizing the specific engine note and feel of a naturally aspirated V8, the Q70 remains an option, despite its fuel consumption. You can check Q70 MPG across all years for a wider perspective.

Tips to maximize efficiency

One of the most effective ways to improve fuel economy in the Q70 5.6L is to adopt a smoother driving style. Avoid aggressive acceleration and hard braking, as these actions consume a significant amount of fuel. Anticipate traffic conditions and maintain a steady pace whenever possible. The Q70’s powerful V8 can deliver a rewarding driving experience without requiring constant bursts of speed.

Ensure that your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressure regularly and inflate them to the recommended levels, typically found on a sticker inside the driver’s side door jamb. Proper tire inflation not only improves fuel economy but also enhances handling and prolongs tire life.

Minimize idling time. When stopped for more than a minute, turn off the engine. Modern engines are designed to restart quickly and efficiently, and the fuel saved by avoiding prolonged idling can add up over time. This is especially relevant in urban environments with frequent stoplights and traffic congestion.

Use cruise control on the highway. Cruise control helps maintain a consistent speed, which can improve fuel economy. By avoiding fluctuations in speed, you reduce unnecessary fuel consumption. However, be mindful of road conditions and adjust your speed accordingly.

Keep up with regular maintenance. A well-maintained engine operates more efficiently. Follow the manufacturer’s recommended maintenance schedule, including oil changes, air filter replacements, and spark plug replacements. A clean air filter and fresh spark plugs can significantly improve fuel economy. See all Infiniti fuel economy data to compare across the brand.