The 2019 Infiniti QX80 4WD gets 15 MPG combined. While fuel efficiency isn’t a priority for most buyers of this vehicle, they do need a large, luxurious SUV for family hauling, towing, and image projection. For this level of size and capability, low fuel economy is often part of the cost, and while 15 MPG is low, QX80 buyers often understand this.

City and highway performance

EPA estimates for the 2019 Infiniti QX80 4WD are 13 MPG in the city and 19 MPG on the highway. The city figure reflects the demands on the 5.6L V8 engine as it accelerates this nearly three-ton SUV. Highway driving is better, but the QX80’s size and less aerodynamic shape still have an impact. The 19 MPG rating will likely drop at speeds above 70 mph or in headwinds.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Infiniti QX80 4WD at $3,850. This is based on 15,000 miles per year and national average fuel prices. Actual costs may vary depending on driving habits, local fuel prices, and idling time, but QX80 buyers should expect a significant fuel bill.

Real-world expectations

Real-world fuel economy often differs from EPA estimates. Many QX80 owners report numbers slightly below the EPA figures, especially in mixed driving. Hard driving, towing, or frequent 4WD use will hurt fuel efficiency. The EPA numbers should be considered optimistic, so budget accordingly. You can examine QX80 MPG across all years to see trends.

How it compares

The QX80’s fuel economy isn’t class-leading. The Cadillac Escalade 4WD with its 6.2L V8 is rated at 16 MPG combined. The Lincoln Navigator 4×4, with its turbocharged 3.5L V6, does a bit better at 18 MPG combined. The Lexus LX 570 matches the QX80’s 15 MPG combined. These seemingly small differences can add up over the vehicle’s life. The 1-3 MPG difference may not be the main purchase factor for buyers, if another SUV has a better interior, towing capacity, or brand image. Before deciding, consider all Infiniti fuel economy data.

Tips to maximize efficiency

Here are ways to minimize fuel consumption in a QX80, even though it’s not known for particularly good gas mileage. Avoid hard acceleration and braking, because these habits significantly reduce efficiency.

Plan routes to avoid stop-and-go traffic, mainly during peak hours to keep a consistent speed and reduce wasted fuel.

Keep tires inflated properly. Underinflated tires raise rolling resistance and reduce fuel economy. Check tire pressure regularly and maintain the recommended psi listed on the driver’s side doorjamb. Cruise control on the highway can help maintain a steady speed, improving fuel efficiency.

Minimize idling, this wastes fuel. Turn off the engine if stopped for more than a minute. Towing impacts fuel economy, so reduce speed and increase following distance for safety.

Regular maintenance is important. Keep the QX80 serviced, including oil and air filter changes, and spark plug replacements, for optimal engine performance. A well-maintained engine is more efficient.