Skip advert
Advertisement
In-depth reviews

Lexus IS 300h (2013-2020) MPG & CO2 emissions

The Lexus IS 300h looks clean compared to diesels, but plug-in rivals are better still

Lexus IS 300h
Overall rating

2.0 out of 5

MPG & CO2 emissions rating

2.0 out of 5

MPG (combined)MPG (high)MPG (low)CO2 emissions
44-49mpg53mpg44mpg133-144g/km

When compared to more traditional choices, there’s no doubt the Lexus IS 300h offers an appealing option for emissions-minded motorists. However, the CO2 output is a little high next to alternative hybrids including Lexus' own ES.

Lexus IS 300h MPG

Our own experience with the Lexus IS 300h is that you’ll struggle to achieve the officially quoted consumption of just under 50mpg. When our sister title Auto Express had one on the fleet, it recorded an average of 41mpg – that’s a little worse than the sort of real-world consumption you might expect from a comparable diesel, but a long way off the quoted figure.

CO2 emissions

Lexus has recorded official CO2 tailpipe emissions figures of 133-144g/km for the IS 300h. While that’s good in comparison to the numbers quoted for traditional diesel or petrol executive models, it’s hardly noteworthy if you’re looking at the latest batch of plug-in hybrids, and even the bigger and more luxurious, yet more efficient Lexus ES

Advertisement - Article continues below

In fact, the IS 300h sits much closer to traditional diesel executive cars like the Mercedes C-Class and BMW 3 Series than it does the PHEVs. The overall value of the hybrid system depends on the type of mileage you cover, and your driving style.

Use a Lexus IS 300h a lot around town, and you’ll get maximum benefit from its electric motor. If you do a lot of B-road mileage, or want to make the most of the power and grip, the numbers will inevitably suffer. Ultimately, the IS is an older car and its emissions and real-world economy are looking less than impressive next to more modern rivals. 

Skip advert
Advertisement
Skip advert
Advertisement

Most Popular

Fisker Ocean subject to massive £15k price cut, but there’s a big catch
Fisker Ocean In red
News

Fisker Ocean subject to massive £15k price cut, but there’s a big catch

Fisker offers up to £15,000 off, but there’s ambiguity around future aftersales support and warranty provision amid financial struggles and investment…
9 Apr 2024
New Vauxhall Frontera Electric is a budget-friendly small SUV with a rugged look and a family focus
Vauxhall Frontera SUV 2024 - front
News

New Vauxhall Frontera Electric is a budget-friendly small SUV with a rugged look and a family focus

The new Frontera Electric gives the UK market a new affordable small SUV option with features designed for the family
8 Apr 2024
New Alfa Romeo Milano: introducing the new baby electric SUV
New Alfa Romeo Milano front 3/4
News

New Alfa Romeo Milano: introducing the new baby electric SUV

Alfa Romeo's new electric SUV is aimed at bringing back Giulietta and Mito loyalists
10 Apr 2024