Parkers overall rating: 4.2 out of 5 4.2

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 5.4 - 6.6 mpp
Diesel engines 5.7 - 6.5 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.

Fuel economy

Petrol engines 45.6 - 56.5 mpg
Diesel engines 49.6 - 56.5 mpg
  • Skyactiv-X engine tech means impressive claimed economy
  • Achievable in the real world too
  • CO2 emissions are great for BIK

Go for a manual 3 Saloon on 16-inch wheels and the Skyactiv-X engine should return up to 52.3mpg. Higher-spec trims with larger 18-inch wheels claim up to 50.4mpg. The automatic is slightly lower, with 47.1mpg and 45.6mpg for cars with 16- and 18-inch alloys respectively.

CO2 emissions are impressively low, with a manual model with 16-inch wheels dipping to 96g/km (102g/km for 18-inchers), while the automatic emits 117g/km no matter the wheel choice.

Mazda’s M Hybrid mild-hybrid system boosts economy with quicker start-stop tech, as well as the advanced nature of the new Skyactiv-X engine technology. In short, it mixes the qualities of combustion and compression ignition for a leaner fuel burn. It doesn’t need to use as much to get going, which has a better effect on economy and performance.

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Is it reliable?

  • Early days for the 3 Saloon
  • New engine is an unknown quantity
  • Mazda has a good reputation, though

Mazda’s managed to create an engine that, allegedly, is something of a revolution. It’s been a long time coming, and there aren’t any out there like it currently, so we’ll have to wait and see if it’s a reliable one.

That said, the company has a good reputation in this area, so there shouldn’t be anything to really worry about. And if you are worried, there’s a three-year, 60,000-mile warranty to keep you covered if you’re buying new.

Servicing is the same as any other petrol Mazda, every 12,500 miles or 12 months.

Ongoing running costs

Road tax (12 months) £165
Insurance group 17 - 23
How much is it to insure?