18 MPG combined isn’t going to win any green awards, but the target demographic for the 2024 BMW M3 Competition M xDrive Sedan 3.0L 6-cyl likely doesn’t care. This isn’t a car bought for saving fuel. It’s a precision instrument made for dissecting apexes and blurring the line between road and race track, a four-door sedan offering breathtaking performance and a level of engagement that few other vehicles can match. The person signing on the dotted line for this M3 isn’t prioritizing Prius-like efficiency. They’re seeking a visceral driving experience, and they’re willing to pay for it, both at the dealership and at the pump.

City and highway performance

The EPA estimates for the M3 Competition M xDrive are 16 MPG in the city and 22 MPG on the highway. That city figure reflects the realities of stop-and-go traffic and the temptation to use the 3.0L turbocharged inline-six’s power. It also shows the inherent inefficiencies of an engine designed for high-performance rather than maximum fuel conservation. The highway figure, while better, still reflects the M3’s personality. Even cruising on the open road, the engine is always eager and the throttle responsive. Maintaining a truly fuel-efficient pace requires restraint that most M3 drivers find difficult to muster. These numbers reflect the M car formula: power, precision, and unflinching performance, with fuel economy taking a backseat.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2024 BMW M3 Competition M xDrive is $3,200. This figure is based on driving 15,000 miles per year and using national average fuel prices for premium gasoline, the only grade recommended for this engine. It’s a substantial sum, placing the M3 firmly in the territory of vehicles that prioritize performance over frugality. Buyers should factor this ongoing expense into their budget, recognizing that the exhilaration of driving an M3 comes with a tangible financial consequence.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy for the M3 Competition M xDrive can vary considerably based on driving style and conditions. Those who frequently use launch control, spend time at track days, or live in areas with heavy traffic will likely see figures south of the official EPA estimates. More restrained drivers, particularly those who spend a significant portion of their time on the highway, might be able to achieve numbers closer to, or even slightly above, the 22 MPG highway rating. However, consistent fuel-conscious driving requires restraint, something that removes many of the reasons to own this vehicle. Be realistic about your driving habits and adjust your expectations accordingly.

How it compares

The M3 Competition M xDrive exists in a rarefied class of high-performance sedans, and its fuel economy reflects this. The Audi RS5 Sportback, another powerful all-wheel-drive contender, manages around 21 MPG combined. The Mercedes-AMG C63 S Sedan, with its handcrafted engine, lands in essentially same territory as M3. If better fuel economy is a concern, the non-Competition M3 with rear wheel drive offers a slight advantage in fuel economy combined with a manual transmission and is the most engaging option for enthusiasts. For a broader perspective, compare all Bmw fuel economy data, including the M3, against other vehicles in BMW’s lineup. If you’re interested in seeing how things have changed over the years, view information on M3 MPG across all years.

Tips to maximize efficiency

While the M3 isn’t designed for maximum fuel efficiency, there are steps you can take to minimize fuel consumption without sacrificing all of the driving enjoyment. The M3 offers various driving modes, including an “Efficiency” mode that adjusts throttle response and transmission mapping to prioritize fuel savings. While not ideal for spirited driving, this mode can be useful for extended highway cruising or navigating stop-and-go traffic.

Avoid aggressive acceleration and hard braking, since the M3’s reliable engine is responsive even with moderate throttle inputs. Gentle acceleration and anticipating traffic flow will help minimize fuel consumption. Similarly, smooth braking, rather than last-minute emergency stops, allows the regenerative braking system (if equipped) to capture energy and reduce wear on the brake pads.

Maintain proper tire pressure. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate to the recommended levels, which can be found on the sticker inside the driver’s side doorjamb. This is especially important, given the M3’s wide tires, which are more susceptible to pressure variations.

Reduce unnecessary weight. Carrying extra weight in your vehicle decreases fuel economy. Remove any unnecessary items from the trunk and passenger compartments. While the M3 is already relatively light for its class, every pound counts.

Plan your trips strategically. Combine errands into a single trip, rather than making multiple short trips. This allows the engine to reach its optimal operating temperature and minimizes cold starts, which consume more fuel.