The 2015 Infiniti Q50A AWD with the 3.7L V6 gets 22 MPG combined. It’s not a fuel-sipping hybrid, but a sport-luxury sedan designed to prioritize a rewarding driving experience over fuel economy. The buyer likely seeks the engaging sound and immediate response of a naturally aspirated V6, and is prepared to pay more at the pump for that.

City and highway performance

EPA estimates for the Q50A AWD 3.7L are 19 MPG in the city and 27 MPG on the highway. The city figure reflects stop-and-go driving, where the V6 engine and all-wheel-drive system consume more fuel. The highway number is better, suggesting longer drives can yield relatively decent efficiency, assuming a steady speed and minimal hard acceleration. While 27 MPG isn’t exceptional, it’s adequate for road trips and commuting, assuming the driver isn’t too aggressive.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Infiniti Q50A AWD 3.7L at $2,650. This calculation is based on driving 15,000 miles per year, evenly split between city and highway driving, using the national average fuel price at the time of calculation. This is only an estimate; individual driving habits, local fuel prices, and even weather conditions can significantly impact the actual fuel cost.

Real-world expectations

EPA estimates offer a baseline, but real-world fuel economy often differs. Aggressive driving, frequent short trips, and consistent high-performance driving will likely result in lower MPG numbers than advertised. However, a driver who prioritizes smooth acceleration, anticipates traffic, and uses cruise control on the highway might see results closer to, or even slightly better than, the EPA estimates. Understanding driving habits is critical to anticipating the true cost of ownership. While many owners report figures close to the stated highway number, the 19 MPG city figure is often optimistic in congested urban environments.

How it compares

The 2015 Infiniti Q50A AWD 3.7L is in the middle of its class in fuel economy. A similarly equipped 2015 BMW 335i xDrive (3.0L turbo six-cylinder) achieves around 25 MPG combined, offering slightly better fuel economy thanks to its turbocharged engine’s efficiency. A 2015 Audi A4 2.0T Quattro, with its smaller turbocharged four-cylinder, manages around 26 MPG combined. A 2015 Lexus IS 350 AWD, with its naturally aspirated 3.5L V6, delivers similar MPG to the Q50A, around 22 MPG combined. Buyers in this segment often weigh performance and driving feel against fuel economy, and the Q50A emphasizes performance more than some of its more economical competitors. For a look at all Infiniti fuel economy data, see our brand page.

Tips to maximize efficiency

The Q50A’s 3.7L V6 responds well to smooth and consistent use of the accelerator. Avoid abrupt acceleration and hard braking, as these actions increase fuel consumption. Anticipate traffic flow and maintain a steady speed when possible. The adaptive cruise control system, if equipped, is a valuable tool for maintaining consistent speed on the highway.

Make sure your tires are properly inflated to the pressure recommended on the door jamb sticker. Underinflated tires create more rolling resistance, making the engine work harder and consume more fuel. Regularly check tire pressure, especially when temperatures change.

Proper vehicle maintenance is critical for optimal fuel economy. Keep up with scheduled oil changes, air filter replacements, and spark plug maintenance. A well-maintained engine runs more efficiently and delivers better MPG. For more information on the Q50A, see Q50A MPG across all years.

The Q50A’s all-wheel-drive system provides better traction and stability, but it also adds weight and consumes more fuel compared to a rear-wheel-drive model. Consider whether you need all-wheel drive based on your local climate and driving conditions. If you live in an area with mild winters and mostly drive on paved roads, a rear-wheel-drive Q50 might be more efficient choice.

Extra weight in the vehicle can reduce fuel economy. Remove any unnecessary items from the trunk. The lighter the vehicle, the less effort the engine needs to move it, resulting in improved MPG.