While 25 MPG combined may not seem like a standout number, it reflects the choice made by Infiniti QX55 buyers: prioritizing style and individuality. This swooping crossover coupe isn’t focused on Prius-like efficiency; it’s designed to make a statement for those who value the QX55’s unique shape and premium features, aspects that often are more important than fuel economy.

City and highway performance

The EPA estimates for the QX55 are 22 MPG in the city and 28 MPG on the highway. The city figure reflects stop-and-go traffic, where the 2.0L turbocharged four-cylinder engine works harder and the automatic transmission shifts more frequently. The highway number is more optimistic and achievable during steady cruising. Drivers in congested urban environments will likely see numbers closer to 22 MPG, while those who use their QX55 for longer road trips will experience closer to 28 MPG.

Annual fuel cost

The official EPA estimate places the annual fuel cost for the 2023 Infiniti QX55 at $2,300. This is based on driving 15,000 miles per year, using a national average fuel price. Individual spending will vary based on driving habits, local fuel prices, and the type of fuel used. The QX55 recommends premium fuel for optimal performance, which could impact the yearly cost.

Real-world expectations

While the EPA provides standardized testing, real-world MPG numbers depend on driving style, road conditions, and even tire pressure. Aggressive acceleration, frequent hard braking, and neglecting routine maintenance can all hurt fuel economy. However, a smoother driving style and proper tire inflation can help you get closer to the EPA estimates, or even exceed them under ideal conditions. Consider the EPA’s 25 MPG combined as a useful benchmark, understanding that your own results will vary.

How it compares

The QX55 exists in a niche segment, and its fuel economy should be viewed accordingly. Compared to the BMW X4 xDrive30i, which gets 23 MPG combined from its similarly sized turbo-four, the QX55 has a slight edge. The Acura RDX SH-AWD, another popular choice, achieves 23 MPG combined. All all Infiniti fuel economy data is readily available for comparison. The Lexus NX 350 AWD, with its turbocharged 2.4-liter, also gets around 25 MPG combined. Those considering the QX55 prioritize finding a balance between efficiency and distinct styling not offered in mainstream SUVs over maximizing fuel economy. You can research QX55 MPG across all years to compare efficiency between model years.

Tips to maximize efficiency

Avoid aggressive acceleration and braking. The QX55’s turbo engine responds well to a gentle touch. Smooth and consistent throttle inputs will improve fuel economy and create a more relaxed driving experience.

Use cruise control on the highway whenever possible. This helps maintain a consistent speed, reducing unnecessary acceleration and deceleration that wastes fuel. Keep a safe following distance to avoid sudden braking.

Ensure your tires are properly inflated to the recommended pressure listed on the driver’s side doorjamb. Underinflated tires increase rolling resistance, forcing the engine to work harder and reducing fuel economy. Check tire pressure regularly, especially during temperature changes.

Reduce unnecessary weight in the vehicle. Extra cargo adds to the overall load, which directly impacts fuel consumption. Remove any items you don’t need, such as sporting equipment or tools, to improve efficiency. Lighter is always better, unless the vehicle is designed for heavier loads.

Schedule regular maintenance. A well-maintained engine runs more efficiently. Follow Infiniti’s recommended maintenance schedule for oil changes, air filter replacements, and spark plug maintenance. Addressing problems quickly can prevent issues that could negatively impact fuel economy.