30 MPG combined is a respectable figure for the 2018 Mazda 3 5-Door 2.5L, a compact hatchback with a sporty character, and it achieves that mileage while also delivering driving enjoyment. This isn’t a hyper-efficient, stripped-down economy car, it’s a genuinely fun-to-drive vehicle that still manages reasonable fuel consumption. Buyers of this particular Mazda 3 prioritize a balance of driving dynamics, practicality, and efficiency, not just squeezing every last mile from a gallon of gas. They’re willing to accept slightly less-than-stellar MPG numbers compared to some competitors in exchange for the Mazda’s engaging character.

City and highway performance

The EPA estimates for the 2018 Mazda 3 5-Door 2.5L are 26 MPG in the city and 35 MPG on the highway. The city figure reflects the realities of stop-and-go traffic, where the car’s weight and the engine’s responsiveness are factors. The 2.5L engine, while not turbocharged, provides ample low-end torque, reducing the need for aggressive throttle inputs that can negatively impact fuel economy. On the highway, the six-speed automatic transmission helps keep the engine at an efficient speed, balancing power. The aerodynamic shape of the 5-door hatchback also helps it cruise efficiently at higher speeds. Drivers will find that achieving the EPA highway estimate is easily attainable with a steady foot and mindful driving habits.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Mazda 3 5-Door 2.5L at $1,450. This figure is based on driving 15,000 miles per year and using national average fuel prices. Remember that this is just an estimate, individual spending varies depending on driving style, location, and current fuel prices. For example, someone who primarily drives in congested city conditions will likely spend more on fuel than someone who mainly uses the car for highway commuting. The $1,450 figure provides a useful benchmark for comparing this vehicle’s fuel costs to other options in the compact car segment.

Real-world expectations

While the EPA estimates provide a good baseline, real-world fuel economy can vary based on individual driving habits and conditions. Some owners report achieving figures close to the EPA estimates, but aggressive driving or frequent short trips can lower the average MPG. The Mazda 3’s responsive engine and well-tuned suspension encourage spirited driving, which can lead to lower fuel economy. However, drivers who adopt a more relaxed and economical driving style can often meet or even exceed the EPA estimates. The key is to be mindful of throttle inputs, avoid unnecessary idling, and maintain consistent speeds on the highway to optimize fuel efficiency. Research 3 MPG across all years to see how this figure stacks up.

How it compares

Compared to its competitors, the 2018 Mazda 3 5-Door 2.5L’s fuel economy is competitive, but not class-leading. The Honda Civic Hatchback with its 1.5L turbocharged engine achieves an EPA-estimated 31 MPG combined, a slight edge over the Mazda. The Toyota Corolla iM (now Corolla Hatchback) with its 1.8L engine offers around 32 MPG combined. However, the Mazda 3 has a more engaging driving experience and a more powerful engine. The Hyundai Elantra GT N-Line, also a sporty hatchback, posts similar fuel economy numbers to the Mazda 3. The buyer seeking outright fuel economy might lean towards the Civic or Corolla, but the Mazda 3 appeals to those who prioritize a more enjoyable driving experience without sacrificing too much fuel efficiency. Review all Mazda fuel economy data to ensure that the fuel cost lines up with your budget.

Tips to maximize efficiency

The “Sport” mode in the Mazda 3 can be tempting, but keep it off unless you need the extra responsiveness for merging or passing. Keep the car in “Drive” in normal driving and let the transmission manage gear selection for optimal fuel economy. Sport mode holds gears longer and uses more fuel.

Maximize your cruise control use on the highway to maintain a consistent speed. Speed fluctuations lead to unnecessary acceleration and braking, which waste fuel. Setting cruise control allows the engine to maintain a constant load, improving efficiency.

Ensure your tires are properly inflated. Underinflated tires create more rolling resistance, which decreases fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure listed on the sticker inside the driver’s side door.

Reduce excess weight in your vehicle. Carrying unnecessary items in the trunk or backseat adds to the vehicle’s weight, which can negatively impact fuel economy. Remove any items you don’t need to carry regularly.

Avoid aggressive acceleration and braking. Smooth, gradual acceleration and deceleration are key to maximizing fuel economy. Anticipate traffic flow and coast whenever possible to reduce the need for harsh braking.