15 MPG combined won’t win any eco-awards, and defines the 2024 Infiniti QX80 4WD 5.6L 8-cyl, a vehicle that embraces old-school luxury and unapologetic capability above all else. This is a body-on-frame SUV designed for buyers who prioritize a smooth ride, a powerful engine, and the ability to tow a substantial trailer, rarely worrying about fuel costs. It’s a specific choice for a specific buyer.

City and highway performance

The EPA estimates 13 MPG in the city and 19 MPG on the highway for the QX80. These numbers reflect the realities of a large, heavy SUV powered by a naturally aspirated 5.6L V8 engine. Stop-and-go city driving is where the QX80’s fuel consumption is most noticeable. The highway figure is more palatable, but still lags behind many of its competitors. The 7-speed automatic transmission works hard to manage the engine’s power, but ultimately, physics dictate the outcome. These numbers will vary significantly based on driver habits, load, and terrain, but are useful as a baseline.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2024 Infiniti QX80 4WD is $3,850. This figure is based on driving 15,000 miles per year and using national average fuel prices. Factors like local fuel costs and individual driving habits can either increase or decrease this number. For owners covering significantly more than 15,000 miles annually, this number will be significantly higher, potentially exceeding $5,000. For those shopping in this segment, the annual fuel cost is often a secondary consideration.

Real-world expectations

As with any vehicle, real-world fuel economy can deviate from EPA estimates. The biggest factor in the QX80’s case is driving style. Aggressive acceleration and frequent hard braking will severely impact fuel consumption. Towing, of course, adds a significant burden, further reducing MPG. Conversely, gentle acceleration, consistent highway speeds, and diligent maintenance can help owners get closer to the EPA figures. Owners who frequently use the QX80 for its intended purpose, hauling passengers and/or towing, should budget for fuel costs exceeding the EPA estimate.

How it compares

Compared to its competitors, the QX80’s fuel economy is near the bottom of the pack. The Cadillac Escalade with its 6.2L V8 achieves 16 MPG combined. The Lincoln Navigator with its twin-turbo V6 gets slightly better numbers at 17 MPG combined. The Lexus LX 600, another body-on-frame SUV, manages 19 MPG combined. These differences can add up to noticeable savings over the lifespan of the vehicle. However, the QX80’s loyal fanbase often prioritizes its unique blend of luxury, comfort, and proven reliability over outright fuel efficiency. You can compare QX80 MPG across all years to see how fuel economy has evolved.

Tips to maximize efficiency

The QX80 isn’t designed for hypermiling, but owners can take steps to improve fuel economy. Keep tire pressures at the recommended levels. Underinflated tires increase rolling resistance, leading to lower MPG. Regularly check and maintain your QX80, including air filter replacements and timely oil changes, to ensure the engine is running optimally.

Minimize unnecessary weight. Remove cargo from the vehicle that isn’t needed on a regular basis, as extra weight increases fuel consumption, notably in urban settings. The heavier the vehicle, the more fuel required to accelerate and maintain speed.

Avoid aggressive driving habits. Hard acceleration and frequent braking consume more fuel than gradual acceleration and smooth deceleration. Anticipate traffic flow to reduce stop-and-go driving. Use cruise control on the highway to maintain a constant speed and optimize fuel efficiency during longer trips.

Plan your trips efficiently. Minimize unnecessary driving by combining errands into a single trip and opting for the shortest routes. Avoiding peak traffic times can reduce idling time and improve overall MPG. Remember to check all Infiniti fuel economy data if you’re considering other models.