16 MPG combined is the reality for anyone considering the 2016 Infiniti QX80 2WD 5.6L 8-cyl. No one buys this vehicle for its fuel efficiency. This is a full-size luxury SUV designed for transporting families and their belongings in absolute comfort and considerable style. Fuel economy is a distant afterthought, a necessary compromise made for its substantial capabilities and opulent interior.

City and highway performance

The QX80’s EPA ratings clearly show its fuel consumption. City driving, typically stop-and-go conditions, yields just 14 MPG, a figure that reflects the engine’s displacement overcoming its considerable weight. The highway number fares somewhat better at 20 MPG, achievable when cruising at constant speeds, but still unremarkable compared to smaller or more technologically advanced SUVs. The QX80’s 5.6L V8, mated to a seven-speed automatic transmission, is tuned for responsiveness and power rather than frugality. The transmission offers smooth shifts, but its primary purpose is to harness the engine’s torque, not optimize fuel consumption.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2016 Infiniti QX80 2WD at $3,600. This figure is calculated based on driving 15,000 miles per year, using a national average fuel price. Your actual fuel costs will vary depending on your driving habits and the price of gasoline in your area. This figure assumes you’re using regular gasoline, although premium is recommended. Using premium fuel will likely deliver a negligible performance benefit, and it will further increase that annual expense.

Real-world expectations

While the EPA provides a baseline, real-world fuel economy often deviates from the official numbers. Aggressive driving, frequent short trips, and carrying heavy loads will certainly push fuel consumption beyond the stated figures. Conversely, gentle acceleration and consistent highway speeds might allow drivers to approach, or even slightly exceed, the 20 MPG highway rating. Most QX80 owners rarely consider hypermiling techniques if they even know what they are, and tend to drive it like the truck that it is. Few drivers reach the maximum EPA rating.

How it compares

The QX80’s fuel economy lags behind many of its competitors. For instance, the Cadillac Escalade (2WD) with its 6.2L V8 manages a slightly better 17 MPG combined. Even the Mercedes-Benz GLS450, with its turbocharged V6, achieves around 20 MPG combined, offering similar levels of luxury with improved efficiency. Although, these vehicles are not exactly setting records for fuel economy. For a buyer drawn to the QX80, the focus is on factors like interior space, towing capacity, and a sense of imposing presence, whereas shoppers focusing on fuel economy might be best served by an entirely different class of vehicle. You can review QX80 MPG across all years on our website.

Tips to maximize efficiency

While the QX80 isn’t known for its efficiency, there are still a few steps you can take to minimize fuel consumption. Avoid aggressive acceleration and hard braking, as these actions rapidly deplete fuel. Anticipating traffic flow and maintaining a steady speed can make a noticeable difference, particularly on the highway.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended specifications found on the driver’s side doorjamb.

Reduce unnecessary weight inside the vehicle. Carrying excessive cargo can negatively impact fuel economy. Remove any items you don’t need on a regular basis, particularly heavy objects in the cargo area.

Consider using cruise control on long highway drives. This helps maintain a consistent speed, minimizing unnecessary acceleration and deceleration. The QX80’s adaptive cruise control, when used judiciously, can further enhance efficiency by automatically adjusting speed to maintain a safe following distance.

Remember to keep up with regular maintenance. A well-maintained engine runs more efficiently. This includes timely oil changes, air filter replacements, and spark plug maintenance. You can see all Infiniti fuel economy data on our site.