29 MPG combined is a respectable figure for the 2021 Mazda 6 2.5L 4-cyl, especially considering its purpose. This isn’t a stripped-down economy car, it’s a stylish and enjoyable mid-size sedan aimed at drivers who appreciate a touch of sporty flair. It delivers fuel economy that’s competitive within its class while prioritizing driving dynamics and premium interior features over squeezing out every last tenth of a mile per gallon.

City and highway performance

The EPA estimates the 2021 Mazda 6 2.5L to achieve 26 MPG in the city and 35 MPG on the highway. The city figure reflects the Mazda 6’s adequate low-end torque, which allows it to move around town without feeling strained. The highway number is aided by the smooth-shifting six-speed automatic transmission (S6), which allows the engine to cruise at relatively low RPMs, improving fuel efficiency over longer distances. The 35 MPG highway rating aligns well with what owners typically experience on road trips, making it a comfortable and efficient long-distance cruiser. Drivers prioritizing consistent highway commutes will find this rating particularly beneficial.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Mazda 6 2.5L 4-cyl to be precisely $1,500. This figure is based on driving 15,000 miles per year and using national average fuel prices. While fuel prices fluctuate, this $1,500 estimate provides a good benchmark for understanding the Mazda 6’s running costs relative to other vehicles. It’s a useful number to keep in mind when budgeting for vehicle ownership, especially for individuals who drive a significant number of miles annually. Drivers are invited to view all Mazda fuel economy data for comparison.

Real-world expectations

While the EPA figures provide a standardized comparison point, real-world fuel economy can vary quite a bit depending on driving habits, traffic conditions, and even weather. Owners who frequently engage in spirited driving, with lots of quick acceleration and hard braking, will likely see their fuel economy dip below the EPA estimates. Drivers who prioritize smooth, consistent driving and use cruise control tend to achieve numbers closer to, or even slightly exceeding, the EPA ratings. Properly maintaining the vehicle including regular oil changes and tire pressure checks is critical to obtaining the best possible fuel economy.

How it compares

The Mazda 6 2.5L is in a competitive segment. The Toyota Camry SE with its 2.5L engine achieves a combined 32 MPG, placing it slightly ahead in fuel efficiency. The Honda Accord LX, similarly equipped with its base engine, boasts 33 MPG combined. The Mazda 6 distinguishes itself in driving pleasure and interior ambiance. While the Camry and Accord prioritize outright efficiency, the Mazda 6 caters to buyers who appreciate a more engaging driving experience and a more upscale interior. The Nissan Altima, with its 2.5L engine, achieves about 32 MPG combined, very close to the class leaders. For buyers primarily concerned with maximizing fuel savings, the Camry or Accord might be slightly more appealing.

For those who value stylish design, a more refined driving experience, and a near-premium interior, the Mazda 6 2.5L offers a good blend of efficiency and enjoyment. Learn more about the 6 MPG across all years.

Tips to maximize efficiency

Gentle acceleration is key to maximizing fuel economy in the Mazda 6. Avoid stomping on the gas pedal when leaving a stop or merging onto the highway. Instead, gradually increase your speed to conserve fuel. The Mazda 6’s responsive engine means you don’t need to push it hard to maintain pace with traffic.

Maintain a consistent speed on the highway. Cruise control helps keep your speed steady and prevent unnecessary acceleration and braking, which can significantly reduce fuel economy. Use the cruise control system whenever possible on longer trips, especially on relatively flat terrain.

Proper tire inflation is important for fuel efficiency. Underinflated tires create more rolling resistance, which forces the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended level, which is typically found on a sticker inside the driver’s side door jamb.

Reduce unnecessary weight in the vehicle. Extra cargo increases the amount of energy required to accelerate and maintain speed. Remove any items from your trunk or backseat that you don’t need on your daily drive. A lighter vehicle consumes less fuel.