16 MPG combined is the reality for anyone considering a 2016 Infiniti QX80 4WD with its 5.6L V8. This isn’t a vehicle purchased for being economical; it’s a statement of reliable capability, luxurious features, and size. The QX80 serves a specific clientele: families needing three rows of seating, individuals who tow frequently, and those who simply desire the commanding presence that only a large SUV can provide. For these buyers, fuel economy is often a secondary consideration, a necessary compromise for the capability and luxury offered.

City and highway performance

The EPA estimates for the 2016 Infiniti QX80’s 4WD variant are 14 MPG in the city and 19 MPG on the highway. The city figure reflects the engine’s need to work harder in stop-and-go traffic, battling the vehicle’s considerable weight with every acceleration. The highway MPG, while still not stellar, is more palatable, representing the engine operating at a more consistent and efficient speed. Real-world highway driving, especially at higher speeds or with a loaded vehicle, can easily dip below that 19 MPG figure, further showing that this is a vehicle for which fuel efficiency plays a minor role in the purchasing decision.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2016 Infiniti QX80 4WD at $3,600. This figure is based on driving 15,000 miles per year and using the national average fuel price. Remember that fuel prices fluctuate, and individual driving habits can dramatically alter this expense. Frequent towing, aggressive driving, or primarily short trips will undoubtedly inflate that number. This expense further defines the buyer: someone who is able and willing to pay a premium for the specific strengths offered by the QX80.

Real-world expectations

Manufacturers test vehicles in laboratory settings that are difficult to replicate in the real world. Expect the QX80 to return numbers near the EPA estimates when driven carefully, however owners have experienced lower figures in day to day use. Some owners have reported combined MPG averages closer to 13-15 MPG, especially in areas with hilly terrain or frequent congestion. Tire pressure, vehicle weight, and driving style all contribute to variances in real-world fuel consumption. As always, regular maintenance is an important component of effective fuel efficiency. Despite the EPA ratings, a close look at QX80 MPG across all years shows consistent fuel efficiency results for this large SUV.

How it compares

Compared to its competitors, the 2016 Infiniti QX80 4WD’s fuel economy is predictable for its class. The Cadillac Escalade 4WD, for example, achieves similar figures, rated at 15 MPG combined. The Lincoln Navigator 4×4 fares slightly better, rated at 17 MPG combined. The Lexus LX 570, another direct competitor with similar size and luxury aspirations, matches the QX80’s 16 MPG combined rating. These comparisons are useful for buyers cross-shopping the segment, but the decision often comes down to factors beyond MPG, such as styling, features, and brand preference. You can view all Infiniti fuel economy data on this site.

Tips to maximize efficiency

While the QX80 isn’t designed for maximum mileage, some driving habits can reduce fuel consumption. Avoid aggressive acceleration and braking, as the V8 works harder to overcome the vehicle’s weight with every sudden change in speed. Maintain a steady speed on the highway and use cruise control where appropriate, allowing the engine to operate more efficiently.

Proper tire inflation is critical. Check your tire pressure regularly and inflate to the manufacturer’s recommended specification, typically found on a sticker inside the driver’s side door. Under-inflated tires increase rolling resistance, forcing the engine to work harder.

Minimize unnecessary weight. Remove any cargo that isn’t essential, as extra weight directly impacts fuel economy. Even small amounts of extra weight add up over time reducing fuel economy.

Consider using a lighter grade of fuel. While the QX80 doesn’t require premium fuel, some owners see a slight improvement in fuel economy when using it. Experiment to see if it makes a noticeable difference for your driving style and conditions, and check the manufacturer’s specifications.

Ensure that the QX80 is properly maintained. Regular oil changes, air filter replacements, and timely spark plug replacements contribute to efficient engine operation. A well-maintained engine consumes fuel more efficiently than one that is neglected.