Parkers overall rating: 4.3 out of 5 4.3

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

Petrol engines 6.0 - 7.5 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 40.4 - 50.4 mpg
  • No diesel engines
  • Both petrols have mild hybrids
  • e-Skyactiv X adopts fuel-saving technology

How much does it cost to run?

Big news: there's no diesel on offer here. Interestingly, other European markets will get cars powered by the black pump, but Mazda reckons UK punters prefer petrol. That means the most economical engine on offer is the e-Skyactiv X. It's the more expensive of the two, and is also the cleanest and fastest.

Both engines have stop-start and a mild hybrid system attached. This uses a small generator to take energy usually lost during braking that can be reused to power electrical systems. This reduces the amount of petrol used, increasing MPG.

You probably won't notice it working. But you will notice that the brakes require a shove, because the energy is recovered via the braking system.

MPG and CO2

  • 2.0-litre e-SkyActiv G manual: 47.9mpg, 134g/km CO2
  • 2.0-litre e-SkyActiv G automatic: 44.1-44.8mpg, 134-144g/km CO2
  • 2.0-litre e-SkyActiv X manual: 49.6-50.4mpg, 127-128g/km CO2
  • 2.0-litre e-SkyActiv X automatic: 46.3mpg, 137-138g/km CO2
  • 2.0-litre e-SkyActiv X manual all-wheel drive: 46.3mpg, 137g/km CO2
  • 2.0-litre e-SkyActiv X automatic all-wheel drive: 42.8mpg, 149g/km CO2

The e-Skyactiv G engine isn't offered with four-wheel drive, but it does come with cylinder deactivation as standard to lower fuel consumption when driven gently. This may not be used very much if you find yourself having to work this engine hard all the time, however.

We managed to achieve 42.1mpg with the more complex e-Skyactiv X in two wheel drive format and with the manual gearbox over a mix of motorway roads.

Two wheel drive models come with a 51-litre fuel tank, while all-wheel drive versions have with a slightly smaller 48-litre one, equating to a range of over 400 miles.

How reliable is it?

  • Mazda has a good reputation 
  • But there's lots of new tech 
  • Three-year warranty as standard

2020 Mazda CX-30 front detail

As the CX-30 uses the majority of its mechanical components with the latest 3 hatchback, parts shouldn't be difficult to source.

There was one recall in 2021 relating to the powered tailgate partially lowering when fully open, affecting just over 7,100 vehicles and updating the software.

The signs should be good, as Mazda has a good reputation for building strong and dependable cars, but we have seen a small proportion of owner's reviews reporting on electrical glitches in various models over the years.

Read owner's reviews on the Mazda CX-30

If you need some extra peace of mind, there's a three-year, 60,000 mile warranty as standard. Not as impressive as five- and seven year offerings from its Japanese and Korean rivals, though.

Servicing and maintenance

Service intervals are 12,500 miles or 12 months, whichever occurs first.

Ongoing running costs

Road tax (12 months) £155
Insurance group 12 - 21
How much is it to insure?