Best EGR cleaner for diesel engines (and how to use it)
If your diesel engine is losing power, belching smoke, or failed its MOT on emissions, the culprit might be your EGR system. And one of the quickest ways to tackle it — without stripping down the engine — is using a high-quality EGR cleaner.
But not all EGR cleaners are created equal.
In this guide, we’ll explain how EGR system cleaners work, when to use them, and why Powerboost Fuel Pro is a market-leading option backed by data.
What does an EGR cleaner do?
The EGR (Exhaust Gas Recirculation) valve helps reduce harmful nitrogen oxide (NOx) emissions by recirculating some of the exhaust gas back into the engine’s intake.
Over time — especially in diesels — the EGR system clogs with soot and carbon. This leads to:
Loss of power
Hesitation under acceleration
Increased fuel use
Black smoke
MOT emissions failures
Fault codes like P0401 or P0402
An EGR cleaner breaks down this carbon build-up. Some are spray-based, but the most effective options — like Powerboost Fuel Pro — are fuel-system treatments that clean not just the EGR, but the entire combustion pathway.
Why Powerboost Fuel Pro is different
Most EGR cleaners only treat the symptoms. Powerboost Fuel Pro tackles the root causes.
✅ Multi-action cleaning: Targets EGR valve, injectors, valves, and combustion chamber
✅ Delivered via fuel: No need to remove or dismantle parts
✅ Formulated for diesel: Optimised for soot-heavy engines
✅ Proven results: Independent tests show up to 14% emissions reduction*
✅ Tablet form: Clean, easy, and accurate dosing
✅ Backed by guarantee: 100% money-back if you're not satisfied
[Link opportunity: See our lab and on-road test results here]
Unlike basic EGR sprays that only clean the intake side, Powerboost Fuel Pro works internally as you drive — making it ideal for modern diesels with complex emission systems.
When should you use an EGR cleaner?
If you’re experiencing any of the following, it’s time to act:
Your diesel car failed its MOT on emissions
The engine feels sluggish or uneven
You see black smoke from the exhaust
Fuel consumption has suddenly gone up
You’ve had EGR-related warning lights or fault codes
Using Powerboost Fuel Pro before these symptoms get worse can help prevent expensive repairs — or a trip to the garage.
How to use Powerboost Fuel Pro
It’s simple:
Add the tablet to your fuel tank before filling up
Drive as normal — ideally a longer trip (20–30 mins) to help heat up the system
Let the cleaner circulate and dissolve carbon build-up over the next tank
For best results, use before an MOT or emissions test.
How to prepare your car for an MOT emissions test
Final word
If you're searching for the best EGR cleaner for diesel engines, don't waste money on cheap sprays that only tackle part of the issue.
Powerboost Fuel Pro is engineered to clean the full fuel and emissions system, helping reduce soot, restore power, and lower emissions — with data to back it up.
Whether you're trying to pass an MOT, improve performance, or just give your engine a proper clean, it's a smart, cost-effective place to start.
Ready to give it a go?
Shop Powerboost Fuel Pro now or See our emissions test results
