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24 Sep 2020
Jamie Gibbs Alice Campion

Could a diesel car work for you?

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diesel

Diesel cars have a pretty bad rap. But could they be a better option for some motorists?

Diesel was introduced as a lower-emissions alternative to petrol.

It was later discovered that diesel emits NOx. This is a collection of harmful gases that can cause respiratory problems. 

Enthusiasm for diesel dropped following car tax rises for cars that didn't follow Euro 6 emissions standards. But for some motorists, diesel might be the best option.  

So behind the headlines, is diesel all that bad? We take a look at whether diesel could be a more cost-effective option for you. 

 

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What is Euro 6?

If you’re buying a diesel car that doesn't meet Euro 6 emissions standards you'll pay more in car tax.

Euro 6 is a European Union directive. It aims to reduce the levels of harmful emissions like CO2 and NOx.

All new diesels must produce less than 80 mg/km of NOx.

READ MORE: UK car tax bands explained

 

When can diesel work for me? 

Diesels aren't exactly the public's favourite these days. But there are some scenarios when going diesel can be a more cost-effective option. 

A lot depends on the diesel particulate filter (DPF). The DPF traps and stores diesel particulate matter or soot from the exhaust gas. 

DPFs have a certain capacity and when it’s met, the filter has to be emptied or burned off to regenerate the DPF. This process reduces the harmful NOx emissions that diesels are known for. 

The DPF can become clogged if you make frequent short journeys. And replacing a diesel particulate filter can be an expensive venture. This is why diesels aren’t recommended for city travelling. 

But if you’re doing long stretches on the motorway, the DPF is less likely to get clogged up.

So if your annual mileage is high, a diesel might be worth considering.

 

So should I buy a diesel car? 

The price of diesel cars has decreased considerably since their tax costs went up.

But new diesels made after 2015 are the cleanest they've ever been. The most recent models have new specifications that target the pollutants.

READ MORE: Should I buy a petrol or a diesel car?

 

What about the 2035 diesel ban?

It's true that you won't be able to buy a new diesel car in the UK after 2035.

And while it would be great to get an electric car now, the truth is that they're still quite expensive. So, what if you're concerned about the planet but also need to watch your wallet?

A 'clean' diesel car that passes the most recent emissions standards might be a compromise for now.

And once you're ready to make the jump to electric, you can look into a scrappage scheme. 

Many manufacturers have schemes where you trade in your diesel to get up to £4,000 off an electric vehicle.

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