21 MPG combined represents the compromise in the 2015 BMW X4 xDrive35i. This isn’t a headline figure for those seeking ultimate efficiency, but it’s not unexpected given the X4’s mission. It’s a coupe-like crossover, prioritizing style and performance over economy. Its typical buyer is more concerned with agile handling and distinctive looks than squeezing every possible mile from a gallon of premium fuel. They accept the less-than-stellar MPG as the price for a sporty, premium driving experience.

City and highway performance

The EPA estimates for the 2015 X4 xDrive35i are 19 MPG in the city and 26 MPG on the highway. The city number reflects stop-and-go driving, where the turbocharged 3.0-liter engine works harder and the eight-speed automatic transmission shifts more frequently. The highway figure is more respectable. With the engine running efficiently at cruising speeds and the transmission in its taller overdrive gears, 26 MPG is achievable, especially on relatively flat terrain. However, aggressive acceleration or sustained high speeds will quickly reduce that number.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 BMW X4 xDrive35i xDrive35i at $2,750. This calculation assumes 15,000 miles of driving per year, with a mix of city and highway conditions, and is based on national average fuel prices. This is just an estimate and your actual fuel costs might be higher or lower, depending on your individual driving habits, the type of driving you do, and the price of gasoline in your area. If you drive more aggressively, or spend more time in heavy traffic, you can expect to exceed the $2,750 figure. This engine requires premium fuel, adding to the cost of ownership. You can see X4 MPG across all years to compare costs.

Real-world expectations

While the EPA numbers provide a baseline, real-world fuel economy often changes. Owners report averaging around 17-20 MPG in mixed driving conditions, a figure that reflects the car’s sporty nature. The temptation to use the engine’s 300 horsepower and 300 lb-ft of torque is hard to resist, and enthusiastic driving habits affect fuel efficiency. The X4’s standard xDrive all-wheel-drive system also results in slightly lower MPG compared to rear-wheel-drive alternatives.

How it compares

Looking at competitors, the 2015 Audi SQ5, with its supercharged 3.0-liter V6, also delivers similar performance and returns around 17 MPG city and 24 MPG highway. The Porsche Macan S, another performance-oriented crossover, achieves comparable figures in real-world driving too. A more direct competitor, the Mercedes-Benz GLC300 coupe achieves closer to 22 MPG combined, but offers less horsepower. These comparisons show that the X4’s fuel economy is in line with other vehicles in its class that prioritize performance. Buyers drawn to the X4 often cross-shop these brands, accepting the fuel cost for the specific driving experience and badge appeal each offers. The broader all Bmw fuel economy data shows a range of options if economy is a higher priority.

Tips to maximize efficiency

Use the car’s “Eco Pro” driving mode when possible. This mode adjusts throttle response and shift points to prioritize fuel efficiency. While it slightly reduces the X4’s responsiveness, it can improve MPG, especially in city driving. Avoid unnecessary idling. Modern engines consume fuel when idling, so if you’re stopped for more than a minute or two, it’s best to switch off the engine.

Ensure that your tires are properly inflated. Under-inflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressures regularly and maintain them at the recommended level, which is usually found on a sticker inside the driver’s side door jamb. Be mindful of your driving style, anticipating traffic flow, accelerating smoothly, and avoiding harsh braking can improve your mileage.

Reduce excess weight. Carrying unnecessary items in your car adds to its overall weight, which reduces fuel economy, so clean out your trunk and remove any items that you don’t need. BMW’s automatic transmissions can sometimes be manually controlled, if you feel you can select gear changes better for economy than the vehicle, experiment to assess improvements.

Consider using cruise control on the highway. Maintaining a consistent speed helps to optimize fuel efficiency, especially on long trips. If you know that the car will be sitting unused for extended periods, make sure that all of the vehicle’s electrical components are switched off, or disconnect the battery. Consistent driving is critical to getting good fuel economy. Avoid short journeys.