15 MPG combined is the price of entry into the 2022 Infiniti QX80 4WD 5.6L V8 ownership club. This isn’t a vehicle purchased for its frugality; it’s a statement. It’s for those who value a spacious, luxurious, and capable SUV, and who are willing to accept the fuel consumption that comes with a traditional, naturally aspirated V8 powering a body-on-frame chassis. Buyers prioritize towing capacity, interior volume, and that unmistakable V8 rumble over achieving class-leading fuel efficiency.

City and highway performance

The EPA estimates the QX80 will achieve 13 MPG in the city and 19 MPG on the highway. The difference between these numbers reflects the QX80’s character. City driving, with its constant stop-and-go, takes a significant toll on fuel economy due to the engine’s displacement and vehicle’s substantial weight. The highway figure, while still not stellar, demonstrates that the QX80 can achieve reasonable efficiency when cruising at a consistent speed. Its 7-speed automatic transmission helps in this scenario, but it’s still far from a hybrid powertrain experience. Owners should expect to see mileage fluctuate depending on driving style and load. Hauling a trailer uphill will undoubtedly impact fuel economy considerably.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2022 Infiniti QX80 4WD 5.6L 8-cyl at $3,850. This figure is based on driving 15,000 miles per year and using national average fuel prices. Fuel prices vary significantly across the country, so this figure is just an estimate. Depending on your location and driving habits, your actual fuel costs could be higher or lower. It’s critical to factor in potential fuel expenses when considering the QX80, as it constitutes a considerable part of the overall cost of ownership.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy is rarely identical to the numbers on the window sticker. Aggressive acceleration, frequent short trips, and consistent hauling or towing will drag down your average MPG. A careful driver who anticipates traffic and avoids unnecessary idling might be able to nudge the highway number a bit higher. Don’t be surprised if your observed mileage falls slightly below the EPA’s ratings. The QX80’s curb weight and powerful V8 necessitate a conscious effort toward efficient driving to achieve the sticker numbers. Check out QX80 MPG across all years for owner-reported data and trends.

How it compares

Compared to its competitors, the QX80 lags behind in fuel efficiency. The Lexus LX 600, while also featuring a powerful engine, manages a slightly better 19 MPG combined. The Lincoln Navigator, with its turbocharged V6, comes in at 17 MPG combined, a noticeable improvement. Even the Cadillac Escalade, with its available diesel engine, surpasses the QX80, achieving up to 22 MPG combined in 2WD form. These numbers matter to some luxury SUV buyers, and they highlight the QX80’s focus on traditional V8 power and capability over outright fuel savings. Review all Infiniti fuel economy data for context.

Tips to maximize efficiency

Proper tire inflation is critical. The QX80 is a heavy vehicle, and underinflated tires create more rolling resistance, which directly impacts fuel economy. Check your tire pressure regularly and maintain it at the recommended level, typically found on a sticker in the driver’s side doorjamb.

Avoid aggressive driving habits. Rapid acceleration and hard braking consume a significant amount of fuel. Smooth and steady acceleration, along with anticipatory braking, will help you conserve fuel. The QX80’s large displacement engine doesn’t need maximal throttle input for merging or passing.

Minimize idling. Letting the engine idle for extended periods wastes fuel. If you anticipate being stopped for more than a minute, turn off the engine. The QX80’s strong starter ensures a quick restart.

Lighten your load. The more weight you carry in the QX80, the harder the engine has to work, and the more fuel you consume. Remove any unnecessary items from the vehicle to improve fuel efficiency. Hauling equipment on the roof also creates drag, which impacts mileage. Only add equipment when you need it.