Parkers overall rating: 3 out of 5 3.0

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

Reliable fuel consumption data for comparison purposes is not available for this model.

Fuel economy

A more stringent standard for fuel economy (WLTP) was introduced from September 2017, and this model was not required to undergo that test. Its fuel economy measured under the previous test system was 30 - 30 mpg. However these figures are less likely to be achievable in real world driving and so should never be compared to another car's mpg which was measured under the newer, more realistic WLTP system.

With no diesel available and only a fairly thirsty V6 petrol on offer, the IS 250C won't be especially cheap to run. On the plus side, insurance is group 17 for all models, which is on par with other premium four-seat convertibles. Similarly, Lexus servicing rates, while expensive, are in line with other upmarket makes. The big advantage is that you'll get superb customer care for your money - Lexus regularly tops customer satisfaction surveys both in the UK and USA.

With one 2.5-litre V6 engine and an automatic gearbox, it's little surprise that the IS 250C is far from green. It emits 219g/km of CO2 and average fuel economy is just 31mpg. Other manufacturers such as Audi and BMW are able to offer more powerful engines, but with considerably lower emissions and much better economy.

Lexus has a superb reputation for reliability and the IS saloon has been no exception. The IS 250C should be equally as good and the engine has been well proven. Problems are few and far between but should the unlikely happen and anything does go wrong, Lexus dealers offer unrivalled levels of customer care.

Ongoing running costs

Road tax (12 months) £330
See tax rates for all versions
Insurance group 29 - 32
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