31 MPG combined is a strong number for a subcompact crossover like the 2017 Mazda CX-3. This isn’t a vehicle purchased for ultimate space or cargo capacity; it’s a stylish, fun-to-drive car for urban professionals and empty-nesters who prioritize driving enjoyment and aesthetics over utility. Fuel efficiency is a welcome bonus.

City and highway performance

The CX-3’s EPA ratings break down to 29 MPG in the city and 34 MPG on the highway. The city figure is noteworthy. Many small crossovers struggle in stop-and-go traffic, but the CX-3’s responsive 2.0L engine and well-tuned six-speed automatic transmission perform well here. The highway number reflects Mazda’s engineering focus: keep the weight down and the engine efficient. While more powerful rivals might pull away on long uphill grades, the CX-3’s fuel sipping makes it a good choice for commuters and those who regularly embark on longer road trips. This front-wheel-drive CX-3 balances power and efficiency within its design.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Mazda CX-3 2WD at $1,400. This is calculated based on driving 15,000 miles per year, using the national average fuel price at the time of testing. Individual costs will vary depending on driving habits, local fuel prices, and the proportion of city versus highway driving, but the $1,400 benchmark provides a useful reference point for comparing the CX-3’s operating expenses to those of competing vehicles in the subcompact crossover segment. This figure is based on regular unleaded fuel, which the Mazda CX-3 accepts.

Real-world expectations

EPA estimates provide a standardized comparison, but real-world fuel economy can differ. CX-3 owners often report figures close to the EPA estimates, particularly when driving moderately. Aggressive acceleration and frequent hard braking will decrease fuel efficiency. The CX-3’s small engine and light weight mean it responds well to gentle throttle inputs. The vehicle’s size also makes it easy to maneuver, reducing the need for excessive braking and acceleration in urban environments. Some drivers have reported exceeding the highway rating on long, flat stretches of road, showing the potential for even greater efficiency.

How it compares

The 2017 Honda HR-V, another popular subcompact crossover, achieves a comparable 31 MPG combined for its front-wheel-drive models with the CVT transmission. A similarly equipped Nissan Kicks gets around 33 MPG combined. However, the driving experience differs: the CX-3 has a more engaging driving feel, while those competitors have more interior space and comfort. The all-wheel-drive variants of the CX-3 show a dip in MPG, closer to 29 MPG combined. For the buyer primarily focused on fuel economy, the 2WD CX-3 strikes a balance between efficiency and Mazda’s driving dynamics. You can also find all Mazda fuel economy data on our dedicated Mazda page.

Tips to maximize efficiency

Use the CX-3’s “Sport” mode sparingly. While it sharpens throttle response and holds gears longer for spirited driving, it also consumes more fuel. Use it only when you need the extra responsiveness, such as merging onto a busy highway. Otherwise, leave the car in its normal driving mode for fuel efficiency.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and reducing fuel economy. Check your tire pressure regularly and inflate them to the recommended level found on the driver’s side door jamb. Doing so will improve fuel efficiency and extend the life of your tires.

Minimize unnecessary cargo. The CX-3 isn’t designed to haul heavy loads. Carrying extra weight, whether it’s in the form of equipment or passengers, reduces fuel efficiency. Remove any unnecessary items from the trunk or rear seats to lighten the load and improve MPG. For a look at the CX 3 MPG across all years, check out our model-specific page.

Plan your routes to avoid stop-and-go traffic. Idling consumes fuel without covering any distance. Use navigation apps to identify and avoid congested areas, choosing routes that allow for smoother driving. Even a few minutes less idling per day can make a difference in your overall fuel economy.