The 2015 BMW 335i, with its 25 MPG combined, balances performance and luxury. It’s not a car for drivers who only want to save money at the gas pump. It’s for those who value a responsive engine, sharp handling, and premium features, accepting slightly higher fuel consumption for the driving experience. These buyers want driving pleasure, and the 335i delivers.

City and highway performance

The EPA estimates for the 2015 335i, equipped with the 3.0L inline-six and eight-speed automatic transmission (S8), show 21 MPG in city driving, where stop-and-go traffic slows you down. On the open highway, that figure rises to 31 MPG, showing the engine’s efficiency at steady speeds. The harder you push the 335i, the less efficient it becomes. The turbocharged engine loves to rev, impacting your real-world fuel economy.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 BMW 335i at $2,300. This is based on driving 15,000 miles per year, with a 55/45 split between city and highway driving, using national average fuel prices. This is an estimate, and your actual fuel costs depend on your driving habits, fuel type, and gas prices. It’s a benchmark for comparing the 335i’s running expenses to other cars in its class, and you can compare 335I MPG across all years.

Real-world expectations

The EPA figures offer a standardized baseline, but real-world fuel economy varies. A 335i driver who accelerates quickly, uses Sport mode, or drives in dense urban areas will likely see figures below the EPA estimates. Someone who drives mainly on the highway, drives gently, and wants to save fuel might achieve better results. Driving style impacts fuel economy.

How it compares

The 2015 BMW 335i competes with other sporty compact luxury sedans. The 2015 Audi S4, with its supercharged V6, offers comparable performance, averaging around 18 MPG in the city and 28 MPG on the highway. A Mercedes-Benz C400 is similar. A Lexus IS 350 provides similar performance and luxury, and achieves about 20 MPG city and 28 MPG highway. For better numbers, explore all BMW fuel economy data.

Tips to maximize efficiency

Use the 335i’s Eco Pro mode. This setting adjusts engine mapping, throttle response, and transmission behavior to save fuel. It reduces the car’s responsiveness but can help on long highway drives or during heavy traffic.

Check tire pressure. Underinflated tires increase rolling resistance, making the engine work harder and consume more fuel. Regularly check and maintain the recommended tire pressure, often on a sticker inside the driver’s side door.

Remove unnecessary weight from the car. Excess cargo adds to the vehicle’s mass, increasing fuel consumption. Remove any items you don’t need, especially heavy objects in the trunk.

Avoid idling. Idling wastes fuel. If you’re stopped for more than a minute, turn off the engine and restart when ready to go.