The best diesel engine cleaners

  • Get rid of build-up carbon deposits
  • Additives to clean injectors, turbos and more
  • Improve performance with Cataclean, STP and Wynn's

Diesel cars may be in decline across the UK, but they still remain a solid choice if you’re regularly doing long journeys. Not much can come close to diesel in terms of motorway fuel efficiency and there are still plenty of diesel vehicles available, both new and used.

One issue that plagues diesel, however, is the build-up of carbon deposits over time. It’s a perfectly natural occurrence and shouldn’t do lasting damage, but affects your engine’s efficiency. Diesel cars lose power, emit more harmful emissions and use more fuel if these deposits go un-checked. A number of engine components are affected; injectors, turbos and emissions equipment can all suffer at the hands of carbon deposits.

Thankfully, there’s a simple solution. A diesel engine cleaner will remove these deposits and allow you to enjoy the full potency of your diesel car. The best part is, that the majority of them are fuel additives, meaning you just bung it in your fuel tank (with regular diesel) and simply drive around as normal to clean your engine out.

Join Parkers as we guide you through the best diesel engine cleaners currently for sale.

The best diesel engine cleaner

Cataclean Diesel DPF and Catalytic Converter Cleaner

Cataclean

Price: £16.99 | VIEW OFFER

If your main concern is reducing engine emissions, then Cataclean is your best bet. Designed to clean and protect your car’s catalytic converter and DPF (diesel particulate filter), it will help reduce nasty pollutants from entering the air.

Pros:
Reduce emissions and increase fuel economy

Cons:
Difficult to notice improvements in performance

STP 5-in-1 Diesel Cleaner

STP 5-in-1 Diesel Cleaner

Price: £12.99 | VIEW OFFER

If you want to give your diesel engine a total blitz, the STP 5-in-1 additive is an excellent option. Pour it into your fuel tank and it’ll start removing buildups from your engine. The 5-in-1 also works as a preventative measure against further deposits building up.

Pros:
Great for removing deposits
Improves engine power

Cons:
Not the cheapest option
MPG boost is debatable

Wynn’s Diesel Turbo Cleaner

Wynn's Diesel Turbo Cleaner

Price: £6.99 | VIEW OFFER

Turbo-diesel engines are very popular these days because they offer greater power while still being very efficient. Sadly, even turbochargers aren’t immune from blockages, so this turbo cleaner will be invaluable. It’ll restore a good chunk of power, just make sure your car comes with a turbocharger first.

Pros:
Helps restore performance
Saves turbochargers from expensive replacement costs

Cons:
Only works with turbo diesel engines

Forte Lubricants Car Diesel System Specialist Injector Cleaner

Forte Lubricants Car Diesel System Specialist Injector Cleaner

Price: £16.25 | VIEW OFFER

Injectors are one of the first things to clog in diesel engines and will affect performance and fuel economy noticeably. This offering from Forte Lubricants will clear your injectors for better power. It is also formulated to help diesel engines when cold, perfect for January in the UK.

Pros:
Formulated to help with cold conditions

Cons:
Rather an expensive option

Wynn’s Diesel EGR Cleaner

Wynn's Diesel EGR Cleaner

Price: £7.59 | VIEW OFFER

The Exhaust Gas Recirculation (EGR) system reduces harmful Nitrogen Oxide emissions (NOx) helping the planet. Unfortunately, particulates can stop this from working which will increase harmful emissions. This aerosol from Wynn’s is designed to clear the EGR valve, air intake system and inlet valves, helping your engine be as efficient and harmless as possible.

Pros:
Reduces harmful emissions
Avoid hefty EGR repair bills

Cons:
Not added to fuel
Will not help injectors or performance

Wynn’s Diesel Particulate Filter Cleaner

Wynn's Diesel Particulate Filter Cleaner

Price: £10.95 | VIEW OFFER

A diesel particulate filter (DPF) is an emission device that removes harmful soot emissions from entering the atmosphere. While these help the planet, they also get clogged up really easily and will strangle performance and hurt fuel economy. This particulate cleaner will remove these soot emissions, making your engine run smoother and cleaner.

Pros:
Reduces soot emissions
Avoid DPF maintenance costs

Cons:
Doesn’t target other areas of the engine

STP High Mileage Injector Cleaner

STP High Mileage Injector Cleaner

Price: £6.99 | VIEW OFFER

If you’re running a high-mileage diesel car, then you’ll have age-related issues to deal with on top of the usual deposit problems. This additive from STP is formulated to both remove stubborn deposits and boost engine power while also protecting your engine from excessive wear.

Pros:
Perfect for cars with over 75,000 miles on the odometer

Cons:
Newer/low mileage cars will not show any difference

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