25 MPG combined isn’t going to win any hypermiling contests, but for the 2016 BMW 340i, a sports sedan designed to deliver thrills first and foremost, it’s a number most owners readily, even happily, accept. This car isn’t about maximizing every last drop of fuel; it’s about experiencing the smooth power of BMW’s turbocharged inline-six, and the chassis’ uncanny ability to blend comfort and control. If ultimate fuel efficiency were the sole goal, prospective buyers wouldn’t even glance in the 340i’s direction.

City and highway performance

The EPA estimates for the 2016 BMW 340i with the 3.0L 6-cylinder engine and 8-speed automatic transmission are 22 MPG in the city and 32 MPG on the highway. These numbers are respectable for a car in this class, considering its performance capabilities. The 22 MPG city rating reflects the engine’s responsiveness and the driver’s likely tendency to use it in urban environments. The 32 MPG highway figure demonstrates that the 340i can be a comfortable and relatively efficient long-distance cruiser when driven with restraint. However, expect that highway number to dip significantly if you’re frequently using that available power to make passes.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2016 BMW 340i is estimated at $2,300. This calculation is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. It’s crucial to remember that this is just an estimate. Your actual fuel costs may vary depending on your driving habits, the type of fuel you use, and fluctuations in fuel prices. Drivers who frequently engage in spirited driving or spend a significant amount of time in stop-and-go traffic will likely exceed this annual fuel cost, while those with longer commutes at steady speeds may undercut it.

Real-world expectations

While the EPA estimates provide a useful baseline, real-world fuel economy for the 2016 BMW 340i often differs. Drivers who prioritize performance and enjoy the engine’s capabilities may see numbers closer to the lower end of the EPA range, both in the city and on the highway. Conversely, those who are more conscious of fuel consumption and adopt a more conservative driving style can often achieve figures that meet or even slightly exceed the EPA estimates. Keep in mind that factors like ambient temperature, tire pressure, and the use of accessories like air conditioning can also influence fuel economy. To get a better sense of what to expect, consult owner forums and online resources where 340I MPG across all years are discussed.

How it compares

Compared to its competitors, the 2016 BMW 340i’s fuel economy is generally in line with other performance-oriented sedans. For example, the 2016 Audi S4, with its supercharged V6, achieves a similar EPA combined rating of 24 MPG. A Mercedes-Benz C450 AMG (later renamed C43 AMG) from the same year posts nearly identical figures. The Cadillac ATS V6 offers comparable performance but often trails slightly in fuel economy. This comparison matters because buyers in this segment are typically cross-shopping these vehicles. They’re willing to accept a certain level of fuel consumption in exchange for the performance and driving experience these sedans deliver. This isn’t about finding the absolute cheapest car to run; it’s about finding the best balance of fun and responsible ownership.

Tips to maximize efficiency

Engage “Eco Pro” mode whenever possible, especially during highway driving or in less demanding traffic situations. This mode adjusts the throttle response and shift points to prioritize fuel efficiency over outright performance. You’ll dull some of the engine’s spark, but you’ll see a noticeable improvement on longer trips.

Ensure your tires are properly inflated to the recommended pressure listed on the driver’s side doorjamb. Underinflated tires increase rolling resistance, which can significantly impact fuel economy. Checking your tires regularly, especially before a long drive, is a simple way to save fuel.

Avoid aggressive acceleration and hard braking, especially in city driving. Smooth, gradual acceleration and anticipating traffic flow to minimize braking can significantly improve your fuel consumption. Think ahead and drive defensively to maximize fuel efficiency.

Consider using premium fuel, as recommended by BMW. While the 340i may run on regular fuel, using premium can optimize engine performance and potentially improve fuel economy, especially under demanding driving conditions. Check your owner’s manual for specific recommendations.

Keep up with regular maintenance, including oil changes and air filter replacements. A well-maintained engine runs more efficiently, which translates to better fuel economy. Neglecting maintenance can lead to decreased performance and increased fuel consumption. For all Bmw fuel economy data, see our brand overview.