19 MPG combined. Nobody buys a 503-horsepower BMW M3 Competition expecting Prius-like fuel efficiency. This is a track-capable, high-performance sedan engineered for exhilarating driving experiences, not maximizing miles per gallon. The fuel economy is the cost of admission to a surprisingly practical daily driver that transforms into a weekend warrior quickly. This is acceptable to the M3 buyer. They understand the bargain they made: raw power and razor-sharp handling, traded for slightly more frequent fill-ups. They prioritize performance over thriftiness, and the M3 Competition delivers a lot of performance.

City and highway performance

The EPA estimates for the 2021 BMW M3 Competition equipped with the 3.0L inline-six and automatic transmission are 16 MPG in the city and 23 MPG on the highway. The city figure reflects the engine’s thirst for fuel during stop-and-go driving, where the turbochargers are less effective and the engine works harder to move the car’s weight. The highway number is more palatable, but still reflects a high-output engine maintaining higher speeds. The M3 Competition is not tuned for maximizing steady-state efficiency; it’s tuned for immediate throttle response and relentless acceleration. Even at highway speeds, a quick downshift can unleash a wave of power that quickly diminishes any fuel efficiency gains.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 BMW M3 Competition at $3,050. This calculation is based on driving 15,000 miles per year and using the EPA’s projected national average fuel price. Remember that this is just an estimate. Your actual fuel costs will vary depending on your driving habits, the type of fuel you use, and fluctuations in gas prices. Someone who drives primarily in congested city traffic will likely exceed this estimate, while someone who does mostly highway cruising might come in slightly below it. Always refer to all Bmw fuel economy data or M3 MPG across all years for further information.

Real-world expectations

While the EPA estimates provide a baseline, real-world MPG for the M3 Competition can vary significantly. Aggressive driving, frequent use of the car’s immense power, and short trips can all reduce fuel economy. Sticking to highway speeds, using the adaptive cruise control carefully, and anticipating traffic flow can help you achieve closer to the EPA’s figures. Expect to see numbers in the high teens if you frequently enjoy the car’s performance, and low 20s on longer highway drives. Many owners average around 18 MPG in mixed driving, which aligns closely with the EPA’s combined estimate.

How it compares

Compared to its competitors, the M3 Competition’s fuel economy is generally in line with other high-performance sedans. For example, the Mercedes-AMG C63 S, with its V8 engine, achieves a similar 17 MPG combined. The Alfa Romeo Giulia Quadrifoglio, another contender in this segment, also posts numbers in the same ballpark. The Audi RS5 Sportback is slightly more efficient at 21 MPG combined, and offers a different driving experience with its V6 engine and all-wheel-drive system. The slightly better MPG can be a selling point for some buyers, but the RS5 doesn’t quite match the M3’s visceral feel and raw performance. Ultimately, fuel economy is rarely the deciding factor in this segment. Buyers are more concerned with performance, handling, and overall driving experience. The M3 Competition delivers on those fronts, even if it isn’t the most fuel-efficient option.

Tips to maximize efficiency

Resist the urge to constantly explore the upper reaches of the tachometer. The M3 Competition’s engine is impressively tractable, even at lower RPMs. Smooth, deliberate acceleration will conserve fuel, while still providing ample power for most driving situations. Only unleash the full potential of the engine when you truly need it, or when you’re on a track where its performance can be fully appreciated.

Take advantage of the car’s driving modes. The “Efficient” mode relaxes the throttle response, optimizes shift points, and reduces engine braking, all of which contribute to improved fuel economy. While it won’t turn the M3 Competition into an economy car, it can make a noticeable difference in daily driving, especially in stop-and-go traffic. Reserve the more aggressive modes for spirited drives and track days.

Monitor your tire pressure regularly. Underinflated tires increase rolling resistance, which forces the engine to work harder and consumes more fuel. Refer to the sticker on the driver’s side doorjamb for the recommended tire pressure, and check your tires at least once a month, or before any long trips. Consider investing in a portable tire inflator to top off the pressure whenever needed.

Plan your routes to avoid congested areas and stop-and-go traffic. Idling consumes fuel without covering any distance, so minimizing your time in traffic can significantly improve your overall fuel economy. Use navigation apps to find the fastest routes and avoid bottlenecks. Even a few minutes saved can save you a noticeable amount of fuel over time.