34 MPG combined is impressive, especially for a BMW wagon with xDrive. While it’s not Prius territory, it offers the practicality of a small SUV with BMW driving dynamics and all-wheel drive. This combination of performance and efficiency is hard to find in other vehicles.

City and highway performance

The EPA estimates for the 2018 BMW 328d xDrive Sports Wagon are 30 MPG in the city and 40 MPG on the highway. These figures highlight the brilliance of BMW’s 2.0L turbocharged diesel engine. In the city, the engine’s strong low-end torque allows for easy acceleration. On the highway, the eight-speed automatic transmission’s tall gearing lets the engine run at low RPMs, maximizing fuel efficiency. The 40 MPG highway figure is achievable for drivers who use smooth, consistent throttle inputs.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 BMW 328d xDrive Sports Wagon at $1,650. This is based on driving 15,000 miles per year and using national average fuel prices. Individual fuel costs will vary based on driving habits and local fuel prices, but this provides a good point of reference. Those who drive a lot can save significant money on fuel. Before deciding, compare against 328D MPG across all years to get an idea of annual fuel costs on vehicles of different years, if you’re buying used.

Real-world expectations

Real-world fuel economy can vary from EPA estimates. Drivers who often drive aggressively, take short trips, or drive in stop-and-go traffic may see lower MPG. Conversely, those who accelerate smoothly, maintain consistent speeds, and use the engine’s stop/start system may meet or even exceed the EPA figures. The 328d offers great fuel economy when driven mindfully.

How it compares

The 2018 BMW 328d xDrive is a standout in fuel efficiency among compact luxury wagons. The gasoline-powered BMW 330i xDrive Sports Wagon of the same year gets closer to 25 MPG combined, a large difference for those wanting less gas. Even compared to non-wagon rivals, the 328d does well. A similarly equipped Audi A4 allroad offers similar practicality and all-weather capability, but typically gets MPG in the high 20s. Buyers considering the 328d often consider small SUVs like the BMW X1 or X3, but even those models, especially in xDrive (all-wheel drive) configurations, usually get worse fuel economy than the 328d. Checking all BMW fuel economy data is a good way to learn more.

Tips to maximize efficiency

Use the Eco Pro driving mode. This setting reduces throttle response, adjusts shift points, and reduces the energy consumption of things like climate control. It might not be the best for fast driving, but it can greatly improve fuel economy in normal driving.

Check tire pressure. Underinflated tires increase rolling resistance, which lowers fuel economy. See the sticker on the driver’s side doorjamb for the recommended tire pressure and check your tires regularly, especially when the temperature changes.

Avoid idling. Modern diesel engines are efficient at idle, but idling still uses fuel. If you expect to be stopped for more than a minute, turn off the engine. The 328d’s automatic start/stop system helps, but you can save more fuel by manually turning off the engine in longer stops.

Anticipate traffic. By looking ahead and anticipating changes in traffic speed, you can avoid unnecessary braking and acceleration. Driving smoothly improves fuel economy and makes driving more enjoyable.

Keep up with scheduled maintenance. A well-maintained engine runs more efficiently. Follow the maintenance schedule in your owner’s manual, including regular oil changes, air filter replacements, and fuel filter replacements. These steps can help your 328d continue to deliver good fuel economy.