28 MPG combined is an acceptable number for the 2015 BMW 320i, even if it’s not the highest available. Buyers of this car aren’t only trying to get every mile from a gallon of premium unleaded. They want the BMW driving experience, a touch of luxury, and brand prestige, all in a relatively affordable package. The 320i offers that, and 28 MPG is a compromise many accept.

City and highway performance

The EPA estimates for the 2015 BMW 320i, with its 2.0L turbocharged four-cylinder engine and eight-speed automatic transmission, are 23 MPG in the city and 35 MPG on the highway. The highway number is more impressive, showing the engine’s ability to cruise efficiently at higher speeds. In cities, stop-and-go traffic reduces efficiency, so the 23 MPG rating is reasonable, given the engine’s responsiveness. However, those who drive mostly in heavy traffic should expect lower numbers; the low 20s are possible.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 BMW 320i at $2,050. This is based on driving 15,000 miles per year and using national average prices for premium gasoline, which the 320i recommends. Fuel prices change, and your real annual cost will depend on your driving, local fuel prices, and the fuel grade you choose. Using regular fuel won’t save much money and could affect your car’s performance.

Real-world expectations

The EPA provides a standard for comparison, but your fuel economy will change. Driving style is important. Quick acceleration and hard braking will lower your MPG. Hills, windy weather, and tire pressure affect real-world numbers. Owners on sites like Fuelly show a range of results. Some get numbers close to the EPA estimates, while others, with more aggressive driving or more city driving, see numbers several MPG lower. Treat the EPA estimates as a reasonable target under good conditions, but expect changes based on your situation.

How it compares

The 2015 BMW 320i’s fuel economy is competitive in the entry-level luxury sedan group. For example, the 2015 Acura ILX with its 2.4L engine gets an EPA-estimated 25 MPG combined. The Audi A3 1.8T manages about 29 MPG combined, a bit better than the 320i. The Mercedes-Benz CLA250 also gets around 29 MPG combined, depending on options. While there are some differences, fuel economy isn’t always the main thing for buyers in this group. They tend to want good driving, a well-known brand, and available features. To learn more, explore all Bmw fuel economy data and 320I MPG across all years.

Tips to maximize efficiency

Driving habits matter. Smooth acceleration and gentle braking maximize fuel efficiency in any vehicle, but especially the turbocharged 320i. Avoid sudden acceleration from a stop, and predict traffic flow to avoid hard braking.

Keep tires inflated. Check tire pressure regularly and inflate them to the recommended pressure on the sticker inside the driver’s side doorjamb. Underinflated tires increase rolling resistance, which hurts fuel economy.

Reduce weight in the car. Remove items from the trunk or backseat that you don’t need to carry. Extra weight strains the engine, reducing fuel efficiency.

Use the 320i’s EcoPro mode. This mode changes the throttle response and shift points to prioritize fuel efficiency. It may reduce performance slightly, but it can improve your MPG, especially during city driving.

Limit air conditioning. Air conditioning puts extra load on the engine, which reduces fuel economy. When you can, use the car’s ventilation system, especially when the outside air is cooler.