18 MPG combined. That’s probably the last thing on the mind of someone cross-shopping the 2023 BMW M3 Competition M xDrive. This isn’t a car bought to save the planet; it’s a performance machine with a laser focus on driving thrills and stunning acceleration. The person signing on the dotted line understands that the exhilaration of launching to 60 mph in around 3 seconds comes at a price, and that price includes frequent trips to the gas station. This strong sedan isn’t about sipping fuel; it’s about devouring asphalt.

City and highway performance

The EPA estimates that in the city, the M3 Competition M xDrive manages 16 MPG. Stop-start traffic and the temptation to constantly tap into the engine’s power contribute to this relatively low figure. On the open road, however, the highway figure improves to 22 MPG. While still not stellar, it shows that the turbocharged engine can achieve reasonable efficiency when cruising at consistent speeds. Of course, even on the highway, resisting the urge to unleash the 3.0L inline-six might prove challenging. That said, even if you see slightly better results than the EPA’s number, don’t expect to brag about Prius-like fuel efficiency to your friends.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2023 BMW M3 Competition M xDrive is $3,200. This figure is calculated based on driving 15,000 miles per year and using national average fuel prices for premium gasoline, which this engine requires. Actual fuel costs can vary significantly depending on driving habits, local fuel prices, and the amount of time spent in demanding driving conditions like spirited canyon carving. The $3,200 estimate provides a baseline, but it’s safe to say that many M3 owners will likely exceed this amount, especially if they participate in track days or frequently exploit the car’s performance.

Real-world expectations

While the EPA provides standardized testing data, real-world MPG frequently deviates. Owners of the M3 Competition M xDrive report a wide range of fuel economy figures, typically landing somewhere between the EPA’s city and highway estimates during mixed driving. Factors such as driving style, traffic conditions, and even tire pressures can influence fuel consumption. Those who prioritize maximizing performance will inevitably see lower numbers, while those who adopt a more conservative driving style can potentially achieve figures closer to the highway rating. If you are keen to see details on M3 MPG across all years, you’ll notice that this model is at the lower end.

How it compares

The M3 Competition M xDrive exists in a competitive segment where performance often trumps fuel efficiency, but comparisons are still relevant. The Audi RS5 Sportback, for example, manages a combined 21 MPG from its twin-turbo V6. The Mercedes-AMG C63 S Sedan, with its hand-built V8 (prior to the new hybrid), achieves a combined 19 MPG. The Cadillac CT5-V Blackwing (supercharged V8) is rated at a meager 15 MPG combined. The M3 sits roughly in the middle of this pack, demonstrating that its balance of performance and efficiency is competitive within its class. The buying decision rarely hinges solely on MPG figures, but rather on driving dynamics, features, and brand appeal. Those concerned about high gas bills can review all Bmw fuel economy data to see if a more efficient model would be a better fit.

Tips to maximize efficiency

While the M3 Competition M xDrive isn’t designed for fuel economy, there are strategies to improve your MPG. Use the car’s “Efficient” drive mode when possible. This mode softens throttle response and optimizes transmission settings for lower fuel consumption, particularly during commutes or long highway journeys. Don’t expect miracles, but it can make a noticeable difference compared to constantly running in “Sport” or “Sport Plus.”

Avoid aggressive acceleration and hard braking. The M3’s power is addictive, but smooth, progressive inputs will significantly reduce fuel consumption. Anticipate traffic flow and maintain a consistent speed whenever possible. Treat every stop light as a potential challenge and MPG will plummet.

Ensure that your tires are properly inflated according to the manufacturer’s specifications. Underinflated tires increase rolling resistance, which directly impacts fuel economy. Check tire pressures regularly, especially during temperature fluctuations.

Minimize unnecessary weight in the vehicle. Carrying extra cargo adds to the overall load and reduces efficiency. Remove any items you don’t need on a daily basis to lighten the car’s weight.

Consider the fuel grade you are using. The M3 Competition M xDrive requires premium fuel but using higher octane than recommended won’t offer any fuel benefit, so don’t waste money thinking you’re improving fuel economy.