Parkers overall rating: 4.3 out of 5 4.3

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

Petrol engines 8.6 - 10.2 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 - 47.9 mpg
  • No diesel engines
  • Both petrols have mild hybrids
  • New Skyactiv-X is economical

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 Skyactiv-X. It's the more expensive of the two, and is also the cleanest and fastest.

It will do 47.9mpg in two-wheel-drive manual form. Add an automatic gearbox, and it drops to 43.5mpg. Four-wheel drive versions, with manual gearboxes will do 43.5mpg. Add an auto and that drops to 40.4mpg. CO2 emissions range from 105g/km to 128g/km.

The Skyactiv-G engine isn't offered with four-wheel drive.

Manual cars will do 45.6mpg and CO2 emissions are 116g/km. Automatic versions drop to 42.8mpg and CO2 emissions increase to 126g/km.

Mild hybrid

Both engines have 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 decent shove, because the enegy is recovered via the braking system.

Is it reliable?

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

Unfortunately, it's hard to predict how reliable the CX-30 is, largely because it's the first time a CX-30 has been available, but also because it uses the majority of its mechanical components and other parts from the latest 3 hatchback, itself an all-new model in 2019. 

The signs should be good, as Mazda has a good reputation for building strong and dependable cars, but if you need some extra peace of mind, there's a three-year warranty as standard. Not as impressive as seven- and five-year offerings from its Korean and Japanese rivals, though. 

Ongoing running costs

Road tax (12 months) £150
Insurance group 12 - 21
How much is it to insure?