20 MPG combined, a figure that’s not going to win any awards, but understanding the 2015 Infiniti QX50 AWD 3.7L requires acknowledging its specific mission: to provide a sporty, luxurious, and all-weather-capable driving experience for a buyer who prioritizes driving dynamics over outright fuel efficiency. This isn’t a hybrid or even a turbocharged four-cylinder. It’s a naturally aspirated V6 with a focus on responsive power delivery, and that comes at a cost.

City and highway performance

The EPA estimates the 2015 Infiniti QX50 AWD at 17 MPG in the city and 24 MPG on the highway. The city figure reflects the engine’s fuel consumption during stop-and-go traffic. The highway number, while better, is hindered by the QX50’s all-wheel-drive system and its relatively short gearing chosen for strong acceleration. These figures highlight the QX50’s bias toward performance rather than maximizing fuel savings. The smooth-shifting seven-speed automatic transmission doesn’t quite offer the fuel-optimizing benefits of modern eight- or nine-speed units. It was a technological marvel for its time, however.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Infiniti QX50 AWD at $2,900. This calculation is based on driving 15,000 miles per year, with a fuel price reflecting a national average for regular gasoline. This figure serves as a benchmark for potential owners, allowing them to factor fuel expenses into their overall cost of ownership. However, individual spending may vary depending on driving habits and local fuel prices. Aggressive driving will certainly increase this number, while a conservative highway commuter might see slightly lower costs. For a broader perspective, check out all Infiniti fuel economy data.

Real-world expectations

While the EPA provides a standardized estimate, real-world MPG often deviates due to factors like driving style, terrain, and weather conditions. QX50 drivers who frequently accelerate hard or drive in heavy traffic might see fuel economy closer to the low end of the EPA range, or even below. Conversely, those who prioritize smooth acceleration, maintain consistent speeds on highways, and keep up with scheduled maintenance can likely meet, or perhaps even slightly exceed, the EPA estimates. The QX50 requires premium fuel, which will naturally inflate the annual fuel cost compared to vehicles that run on regular gasoline.

How it compares

The 2015 QX50 wasn’t competing with hybrid crossovers in its class. Compared to similar vehicles from that era, its fuel economy lands somewhere in the middle. For instance, the 2015 Acura RDX with its 3.5-liter V6 and front-wheel drive achieves 20 MPG combined and 22 MPG combined with all-wheel drive. The 2015 BMW X3 xDrive28i turbo four-cylinder manages 24 MPG combined. The Acura RDX is a closer competitor in terms of its V6 engine, but the X3 highlights the increased fuel efficiency offered by smaller displacement, turbocharged engines. The QX50 buyer, however, is often looking for the strong feel and sound of a naturally aspirated V6 engine, accepting the tradeoff in fuel economy for the more engaging driving experience. For those trying to get the best possible MPG in the QX50 line, exploring QX50 MPG across all years is a good step.

Tips to maximize efficiency

Avoid aggressive acceleration and hard braking to extend the life of fuel in the tank. The QX50’s powerful V6 can tempt you to enjoy its responsive acceleration, but doing so frequently will significantly reduce fuel economy. Smooth and steady driving is key to maximizing MPG.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended level (found on the doorjamb sticker).

Reduce unnecessary weight in the vehicle. Extra weight forces the engine to expend more energy. Remove any unnecessary items from the trunk and cabin to improve fuel efficiency.

Minimize idling. Extended idling consumes fuel without covering any distance. If you’re stopped for more than a minute, turn off the engine. This simple habit can save fuel, especially in city driving.

Keep up with routine maintenance, especially oil changes and air filter replacements. A well-maintained engine runs more efficiently, improving fuel economy. Dirty oil and clogged air filters can hinder performance and reduce MPG.