The 2023 Infiniti QX80 4WD with its 5.6L V8 gets 15 MPG combined. It is not a vehicle for penny-pinchers or hypermilers. The QX80 exists to move a large family and their belongings in luxurious comfort, with all-weather capability and a commanding presence. Its buyers prioritize space, power, and opulence over fuel efficiency and accept the cost at the pump.

City and highway performance

The EPA estimates the QX80 gets 13 MPG in the city and 19 MPG on the highway. Expect the city figure to be sensitive to driving style. Frequent stop-and-go traffic and a heavy foot will quickly drag that number lower. The highway figure relies on consistent speeds and a reasonably light load. If you pack it full of passengers and luggage, you’ll see it dip closer to the combined rating. The seven-speed automatic transmission is generally smooth and responsive, but its primary focus is on providing readily available power from the V8, not squeezing out every fraction of a mile per gallon.

Annual fuel cost

The EPA estimates an annual fuel cost of $3,850 for the 2023 Infiniti QX80 4WD. This is based on driving 15,000 miles per year, using a national average fuel price. It’s a substantial figure, but a useful benchmark for gauging the QX80’s running costs compared to other vehicles. Your actual fuel expenses will vary depending on local gas prices and your individual driving habits, but you should plan on budgeting a significant amount for fuel if you own this vehicle.

Real-world expectations

While the EPA provides a standardized testing methodology, real-world MPG will always vary. Factors such as driving style, terrain, weather conditions, and even tire pressure can impact fuel economy. Owners who frequently haul heavy loads or tow trailers will see a decrease in MPG. Conversely, those who primarily use the QX80 for long highway commutes with minimal stop-and-go may occasionally achieve slightly better than the EPA’s highway rating. Most owners should expect figures that hover around the official combined rating of 15 MPG. Considering this vehicle’s weight and engine size, that aligns with the expected trade-offs.

How it compares

The QX80’s fuel economy lands where you might expect against its competitors. The Cadillac Escalade 4WD with its 6.2L V8 achieves a slightly better 16 MPG combined. The Lincoln Navigator 4×4 boasts 18 MPG combined from its turbocharged V6. The Lexus LX 600, featuring a twin-turbo V6, manages only 19 MPG combined. For buyers primarily concerned about fuel efficiency, these might be considerations, but QX80 buyers are often swayed by the Infiniti’s styling, feature set, or pricing. You can access QX80 MPG across all years to compare.

Tips to maximize efficiency

Although the QX80 is not a fuel-sipping machine, there are steps you can take to improve fuel economy within its inherent limitations. Gentle acceleration and smooth braking are key. Avoiding unnecessary hard stops and jackrabbit starts will conserve precious fuel because the QX80 is a heavy vehicle to get moving.

Ensure your tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly, especially during temperature changes.

Minimize unnecessary weight by removing any unnecessary cargo from the vehicle because this reduces the load on the engine and can lead to improved fuel efficiency. Cleaning out the trunk and removing roof racks when not in use can make a difference over time.

Plan your trips strategically to avoid stop-and-go traffic whenever possible. Idling consumes fuel without covering any distance, so finding routes with fewer traffic jams can improve your MPG. The navigation system can help find alternate routes during peak times.

Regular maintenance is crucial. Keeping the engine properly tuned and ensuring all fluids are at the correct levels will help maintain optimal performance and fuel efficiency. Schedule routine maintenance checks to address any potential issues promptly. You can explore all Infiniti fuel economy data.