19 MPG combined is the price of admission for serious performance in the 2015 BMW M3. This isn’t a penalty, it’s a transaction. Buyers understand exactly what they’re getting: a razor-sharp sports sedan with a ferocious twin-turbo inline-six. Fuel economy is secondary to the driving experience, but it’s still a factor worth considering.

City and highway performance

The EPA estimates 17 MPG in the city and 24 MPG on the highway for the 2015 M3 with the 3.0L inline-six and automatic (AM-S7) transmission. Obviously, ‘your mileage may vary’ depending on how you drive it. Treat the throttle with respect, and you might approach those highway numbers. Spend your time exploiting that engine’s capabilities, and expect significantly lower results. The spread between city and highway figures hints at the M3’s dual personality: reasonably civilized during commutes, but always eager to unleash its full potential on the open road. For those doing primarily city driving, the fuel consumption will be noticeably worse than buyers who do long highway runs regularly.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 BMW M3 at $3,050. This figure is based on driving 15,000 miles per year and assumes fuel prices based on national averages when the figure was calculated. Keep in mind that fluctuating gas prices will directly impact this number. Also, this calculation is based on using the manufacturer’s recommended fuel. Using premium fuel when it’s not required will increase your costs without improving performance, though the high-compression engine in the M3 really does need premium fuel to deliver expected performance.

Real-world expectations

Don’t expect to consistently match the EPA’s numbers in the real world. The M3’s performance invites aggressive driving, and the twin-turbo engine is more than happy to oblige. M3 enthusiasts usually aren’t prioritizing fuel efficiency, they’re seeking a visceral driving experience. Expect numbers closer to the combined rating, especially with frequent spirited driving. Aggressive acceleration, hard braking, and extended idling will all negatively impact your MPG. Keep an eye on real-world data from other M3 owners to get a sense of what’s actually achievable in mixed driving conditions. Check out M3 MPG across all years.

How it compares

Compared to its direct rivals, the 2015 M3 sits in a similar fuel economy range. The Mercedes-AMG C63 S sedan (W205 generation) with its Handcrafted 4.0L V8 Biturbo manages around 18 MPG combined. The Audi RS5 Sportback, with its 2.9-liter TFSI V6, is slightly better at around 21 MPG combined. The Alfa Romeo Giulia Quadrifoglio, known for its Ferrari-derived V6, sees around 20 MPG combined. This comparison illustrates that buyers in this segment understand and accept the fuel consumption penalty for the performance offered. Those cross-shopping the M3 with something like a Cadillac CT5-V (non-Blackwing) for its performance and fuel consumption will want to see all Bmw fuel economy data.

Tips to maximize efficiency

Use “Efficiency” mode when cruising on the highway. The M3 offers selectable driving modes that adjust throttle response, steering feel, and suspension firmness. Selecting the most conservative mode will reduce throttle sensitivity and encourage smoother acceleration, thus conserving fuel. This might fly in the face of what M3 owners are seeking, but on longer motorway drives, it is useful.

Maintain proper tire inflation. Correct tire pressure minimizes rolling resistance, which translates directly into improved fuel economy. Check your tires regularly and inflate them to the pressure recommended on the door jamb sticker. Small changes can have a surprising impact, especially over time.

Anticipate traffic flow and avoid unnecessary braking. Smooth, consistent driving minimizes energy loss. By looking ahead and anticipating changes in traffic, you can often avoid sudden braking and acceleration, leading to better fuel efficiency. The advanced drivetrain in the M3 is at its best when it is delivering consistent power, not reacting to stop/start conditions.

Avoid extended idling. Modern engines don’t need to warm up for extended periods. Excessive idling wastes fuel and increases emissions. If you’re stopped for more than a minute, it’s generally better to turn off the engine. The engine is ready to deliver performance the instant it is started.