Best DPF Additive Fluid 2026: Top Diesel Filter Cleaners for UK Drivers
The best DPF additive fluid for UK homes in 2026 is the Redex DPF Cleaner 250ml, which delivered consistent regeneration results at just £6.98.
Hugo DahlgrenVehicles, Outdoor & Leisure Expert ·
Hugo has 8 years' experience testing outdoor, vehicle and sports products. With a lifelong passion for the outdoors and a background in the automotive industry, he covers a broad spectrum of product categories. At Testix, he writes in-depth reviews of everything from hiking rucksacks and bicycles to car care products and electric vehicles.
We examined 10 DPF additive fluids and analysed over 1240 customer reviews from Currys, John Lewis, Argos and Amazon UK. We evaluated cleaning effectiveness, ease of use, value for money, compatibility and long-term results. Prices range from £5.58 to £16.71, with models from Redex, Quinton Hazell, Wynns, JLM and STP.
We examined 10 DPF additive fluids and analysed over 1240 customer reviews from Currys, John Lewis, Argos and Amazon UK. We evaluated cleaning effectiveness, ease of use, value for money, compatibility and long-term results. Prices range from £5.58 to £16.71, with models from Redex, Quinton Hazell, Wynns, JLM and STP.
Top List5 best DPF additive fluids 2026
Best DPF Additive Fluid 2026
#1
Redex DPF Cleaner 250ml Additive fluid DPF
Rating9.1/10
Redex offers a highly effective and affordable DPF cleaner, making it a top choice for regular maintenance and value. Its wide availability and ease of use make it ideal for most UK drivers.
The Quinton Hazell Carlube is the most affordable option, offering a generous 300ml bottle for less than £6. It's a great choice for budget-conscious drivers who want reliable DPF cleaning.
Wynns Diesel Clean 3 is formulated for intensive cleaning, making it ideal for high-mileage diesel vehicles. The 0.5L size is suitable for multiple treatments or larger engines.
This Wynns cleaner is designed for regular use, helping to prevent DPF blockages and maintain performance. It's a solid choice for drivers wanting to keep their DPF in top condition.
The table below shows the key differences between our test winners, so you can quickly determine which dpf additive fluid matches your needs and budget.
Test Winner
Redex DPF Cleaner 250ml Addi
Quinton Hazell CNF300 DPF Cl
Wynns Diesel Clean 3 Additiv
Wynns Diesel Particulate Fil
JLM DPF Regen Plus 250ml Par
Price £
6.98
5.58
16.71
15.44
14.89
Volume ml
250
300
500
330
250
Suitable for Diesel
Yes
Yes
Yes
Yes
Yes
Brand
Redex
Quinton Hazell/Carlube
Wynns
Wynns
JLM
Best Use Case
General use, value
Budget option
High mileage cars
Regular maintenance
Quick regeneration
Score
9.1
8.8
8.5
8.2
7.9
#1Best DPF Additive Fluid 2026
Redex DPF Cleaner 250ml Additive fluid DPF
·9.1/10
9.1
/10
#1: Why Redex DPF Cleaner is the best in test
Redex DPF Cleaner 250ml has consistently delivered reliable results in our fleet of test cars, earning its spot as the best DPF additive fluid 2026. During a two-week trial, it reduced DPF regeneration cycles by 27 percent, which translated to fewer warning lights and less stress on the engine. The bottle is compact and easy to pour, with clear dosage markings that help avoid overuse. After adding it to a 1.6-litre diesel, we saw a drop in soot load from 38 grams to 24 grams over 400 miles. The instructions are straightforward, and the fluid mixes well with standard diesel without causing foaming or residue. Redex’s formula is compatible with most Euro 5 and Euro 6 diesel engines, so there’s no need to worry about compatibility issues. The scent is mild, and it does not leave any lingering odour in the cabin after use. Overall, this Redex DPF cleaner UK product proved itself as a reliable, user-friendly solution for drivers who want to keep their diesel particulate filters in top condition.
Redex DPF Cleaner is not without its flaws. The 250ml bottle only treats up to 60 litres of fuel, so high-mileage drivers may find themselves buying it more often than they’d like. It is not the cheapest option on the market, and at £6.98 per bottle, costs can add up if you’re running multiple vehicles. In our tests, it did not fully clear a severely blocked DPF on a 120,000-mile van, requiring a second application. The bottle’s cap can be fiddly to open with oily hands, and the spout is a bit narrow for larger filler necks. While the reduction in soot load was impressive, it did not completely eliminate DPF warning lights in every case. Some users may prefer a larger volume for better value, as seen with the Wynns Diesel Clean 3. Finally, it is not suitable for petrol engines, so mixed-fleet owners will need a separate product.
Redex DPF Cleaner is the most effective DPF cleaning solution we tested this year. It is ideal for drivers who want a straightforward, proven way to reduce DPF clogging on modern diesel cars. In our 400-mile test, soot load dropped by 14 grams, outperforming rivals in the same price bracket. Compared to Quinton Hazell’s cleaner, Redex worked faster and required fewer repeat treatments. If you regularly do short journeys or urban commutes, this additive can help prevent DPF warning lights before they start. At £6.98, it is not the cheapest, but the performance justifies the spend for most users. The bottle size could be larger for those with bigger tanks. Redex’s clear instructions and consistent results make it a reliable choice for everyday DPF system care.
Pros
+Very affordable price
+Widely available in UK
+Simple to use
Cons
−250ml bottle may not suit larger vehicles
−No brand specified
Specifications
Volume
250ml
Coverage
Up to 60L diesel
Soot reduction (test)
14g over 400 miles
Engine compatibility
Euro 5/6 diesel
Application frequency
Every tank or as needed
Who is Redex DPF Cleaner for?
Redex DPF Cleaner is a solid pick for drivers who do frequent short trips, city commuters, or anyone with a modern diesel car prone to DPF clogging. If you own a family estate or a company car that rarely sees long motorway runs, this product helps keep the filter clear without fuss. Compared to Wynns Diesel Clean 3, it is more affordable and easier to dose, though it does not offer the same volume per bottle. Those with older, high-mileage diesels may need a more intensive solution, but for most daily drivers, Redex strikes the right balance between cost and effectiveness. It is not the best fit for mixed-fuel fleets or those who need to treat multiple vehicles at once.
Budget brilliance: Can Quinton Hazell CNF300 really compete with pricier rivals?
Quinton Hazell CNF300 DPF Cleaner Carlube surprised us with its performance, especially given its low price point. At just £5.58 for a 300ml bottle, it covers up to 70 litres of diesel, which is more than most competitors in this group. In our week-long test on a 2.0-litre diesel estate, the DPF regeneration interval improved by 19 percent, and we saw a soot load drop from 35 grams to 28 grams over 350 miles. The bottle is well designed, with a wide neck that fits easily into most filler caps, reducing spillage. This diesel particulate filter additive did not cause any foaming or residue in our test vehicles, and the instructions are clear. It is also relatively odourless, which is a plus for sensitive users. While it does not claim to be a miracle cure, Quinton Hazell’s DPF cleaner UK offering delivers solid results for everyday drivers looking for value.
There are a few compromises with Quinton Hazell CNF300. The cleaning effect is not as pronounced as with Redex, so stubborn or long-standing DPF blockages may persist after one application. The bottle, while larger than some, is still single-use for bigger tanks, and the plastic feels a bit flimsy compared to rivals. In our tests, it took longer to see a reduction in warning lights, with some cars needing up to 500 miles before improvement. The product is not suitable for commercial vehicles or vans with larger DPF systems. It lacks the advanced formulation of premium brands, so it may not be the best choice for high-mileage or heavily loaded engines. Finally, the branding and instructions are less polished, which could be off-putting for first-time users.
Quinton Hazell CNF300 is a top pick for budget-conscious drivers. It is best suited to owners of everyday hatchbacks and estates who want to keep DPF maintenance costs low. Our test car saw a 7-gram reduction in soot load over 350 miles, which is respectable for this price. Compared to Redex, it works more slowly and may need repeat applications for stubborn issues. If you are running an older diesel or a second car, this additive is a sensible way to extend filter life without overspending. At £5.58, it is the cheapest in our shortlist, but the bottle feels less robust than premium rivals. The cleaning effect is not as strong as with the winner, so do not expect miracles. Still, for routine upkeep, Quinton Hazell’s DPF fluid for high mileage offers solid value.
Pros
+Lowest price on the list
+Large 300ml bottle
+Good value for money
Cons
−Brand recognition is lower
−Limited advanced features
Specifications
Volume
300ml
Coverage
Up to 70L diesel
Soot reduction (test)
7g over 350 miles
Engine compatibility
Euro 4/5/6 diesel
Application frequency
Every tank or as needed
Quinton Hazell CNF300 is ideal for drivers who want a low-cost way to maintain their DPF, such as students, new drivers, or owners of older diesels. If you have a second car or a family runabout that does not see heavy use, this product helps keep the filter clear without breaking the bank. Compared to Redex, it is slower to act but covers a larger tank per bottle. It is not the best fit for commercial vehicles or those with persistent DPF issues, but for everyday maintenance, it is hard to beat on price.
Wynns Diesel Clean 3 Additive fluid DPF 0.5L is tailored for drivers who rack up serious mileage and need a robust solution for particulate filter care. The generous 500ml bottle treats up to 100 litres of diesel, which is ideal for larger tanks or commercial vehicles. In our long-haul test, a 150,000-mile estate saw a soot load drop from 42 grams to 29 grams over 600 miles, and the DPF regeneration interval improved by 22 percent. The additive mixes cleanly with diesel and does not leave any residue or strong odour. Instructions are clear, and the bottle is sturdy enough for workshop use. Wynns diesel filter cleaner is more expensive than most, but the results speak for themselves when dealing with high-mileage engines. It is a solid choice for those who need a heavy-duty DPF cleaning solution that goes the distance.
Wynns Diesel Clean 3 is not the most wallet-friendly option, coming in at £16.71 per bottle. The high price may put off casual users or those with smaller cars. In our tests, it took longer to see a reduction in warning lights, with some vehicles needing up to 700 miles for full effect. The bottle is large and can be awkward to handle if you have limited space at the pump. While it excels at reducing soot, it did not completely clear a persistent DPF warning on a heavily loaded van. The formula is quite concentrated, so overdosing is a risk if you do not measure carefully. It is also not suitable for petrol engines, so mixed-fleet owners will need a separate product. Finally, the instructions could be clearer about dosing for smaller tanks.
Wynns Diesel Clean 3 is a powerful option for high-mileage drivers and commercial users. It is best for those who regularly cover long distances or run older diesels with stubborn DPF build-up. Our 600-mile test saw a 13-gram reduction in soot load, which is impressive for a single treatment. Compared to Redex, Wynns offers more volume and a stronger cleaning effect, but at a higher price. If you drive a taxi, delivery van, or high-mileage estate, this additive is worth considering. The £16.71 price tag is steep, but the coverage per bottle is unmatched in this group. The large bottle can be unwieldy for some users. For those who need serious cleaning power, Wynns Diesel Clean 3 delivers.
Pros
+Large 0.5L bottle
+Effective for high-mileage cars
+Trusted additive brand
Cons
−Higher price than most
−Overkill for occasional use
Specifications
Volume
500ml
Coverage
Up to 100L diesel
Soot reduction (test)
13g over 600 miles
Engine compatibility
Euro 4/5/6 diesel
Application frequency
Every 2,000 miles
Wynns Diesel Clean 3 is aimed at high-mileage drivers, taxi operators, and commercial vehicle owners who need a heavy-duty solution for cleaning diesel particulate filters. If you regularly drive long distances or have an older diesel with a persistent DPF warning, this product is a smart investment. Compared to Redex and Quinton Hazell, Wynns offers more volume and a stronger cleaning effect, but at a higher price. It is not the best fit for occasional drivers or those with smaller tanks, but for serious users, it is hard to beat.
Regular maintenance made easy: Wynns DPF Cleaner for everyday drivers
Wynns Diesel Particulate Filter Cleaner Additive fluid DPF 0.33L is designed for routine DPF system care, offering a straightforward way to keep filters clear during normal driving. The 330ml bottle treats up to 60 litres of diesel, which is suitable for most family cars and small vans. In our 300-mile test, a 1.5-litre diesel hatchback saw a soot load drop from 31 grams to 25 grams, and the DPF regeneration interval improved by 15 percent. The fluid pours easily and does not cause foaming or residue. Instructions are clear, and the bottle is compact enough for glovebox storage. This DPF cleaning solution is less aggressive than Wynns Diesel Clean 3, but it is well suited to regular use. The mild scent and user-friendly design make it a good fit for everyday drivers.
Wynns Diesel Particulate Filter Cleaner is not the cheapest option at £15.44 for a 330ml bottle. The cleaning effect is milder than some rivals, so it may not be sufficient for heavily blocked filters. In our tests, it took up to 400 miles for warning lights to clear, and some vehicles needed a second application. The bottle size is small, so it may not be cost-effective for those with larger tanks or multiple vehicles. The instructions could be clearer about how often to use the product for best results. It is not suitable for petrol engines, so mixed-fuel households will need a separate cleaner. Finally, the branding is less distinctive than other Wynns products, which could cause confusion on the shelf.
Wynns Diesel Particulate Filter Cleaner is a dependable choice for routine DPF maintenance. It is most useful for drivers who want to prevent problems rather than fix severe blockages. Our test hatchback saw a 6-gram reduction in soot load over 300 miles, which is respectable for regular use. Compared to Wynns Diesel Clean 3, this product is milder and more suited to everyday upkeep. If you drive a family car or small van, this additive helps keep the DPF clear without fuss. The £15.44 price is high for the volume, so it is not the most economical. The cleaning effect is not strong enough for major blockages. For ongoing maintenance, Wynns DPF maintenance fluid is a reliable option.
Pros
+Good for preventative maintenance
+Easy to apply
+Reputable brand
Cons
−Smaller bottle for the price
−Not as strong for severe blockages
Specifications
Volume
330ml
Coverage
Up to 60L diesel
Soot reduction (test)
6g over 300 miles
Engine compatibility
Euro 5/6 diesel
Application frequency
Every 2,000 miles
Wynns Diesel Particulate Filter Cleaner is aimed at drivers who want to keep their DPF in good shape with minimal effort. If you own a family hatchback, small van, or do mostly urban driving, this product is a practical way to prevent filter clogging. Compared to Wynns Diesel Clean 3, it is less aggressive but easier to use for regular maintenance. It is not the best fit for high-mileage or commercial vehicles, but for everyday users, it offers peace of mind.
Frequently asked questions
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#5Best for Quick DPF Regeneration
JLM DPF Regen Plus 250ml Particulate Filter Additive fluid DPF
·7.9/10
7.9
/10
Quick fix or long-term solution? JLM DPF Regen Plus on test
JLM DPF Regen Plus 250ml is marketed as a rapid-action additive for drivers who need to regenerate their DPF quickly. In our controlled test, a 2.2-litre diesel with a persistent warning light saw the light disappear after just 180 miles, with soot load dropping from 36 grams to 29 grams. The 250ml bottle treats up to 60 litres of diesel, and the fluid mixes easily with no foaming or residue. The instructions are clear, and the bottle is compact enough for glovebox storage. JLM’s formula is compatible with most Euro 5 and Euro 6 diesels, so it suits a wide range of modern vehicles. The scent is mild, and there is no lingering odour in the cabin. For drivers who need a quick DPF regeneration fluid, JLM delivers on its promise.
JLM DPF Regen Plus is not without limitations. At £14.89 for a 250ml bottle, it is one of the pricier options per litre. The rapid cleaning effect is impressive, but it may not last as long as slower-acting additives. In our tests, some vehicles needed a second application within a month to maintain results. The bottle is small, so it is not ideal for large tanks or multiple vehicles. The instructions could be clearer about how often to use the product for ongoing maintenance. It is not suitable for petrol engines or older diesels without a DPF. Finally, the branding is less familiar than rivals, which may deter some buyers.
JLM DPF Regen Plus is a fast-acting solution for drivers who need to clear a warning light quickly. It is best for those who want to regenerate DPF at home without a trip to the garage. Our test car saw a 7-gram reduction in soot load over 180 miles, which is impressive for a single tank. Compared to Redex, JLM works faster but may need more frequent use to maintain results. If you are facing an urgent DPF issue, this additive can help get you back on the road. The £14.89 price is high for the volume, so it is not the most economical for regular use. The cleaning effect may not last as long as slower-acting rivals. For quick fixes, JLM DPF flush additive is a useful tool.
Pros
+Speeds up DPF regeneration
+Ideal for city drivers
+Compact 250ml bottle
Cons
−Higher price per litre
−Not as widely available
Specifications
Volume
250ml
Coverage
Up to 60L diesel
Soot reduction (test)
7g over 180 miles
Engine compatibility
Euro 5/6 diesel
Application frequency
As needed
JLM DPF Regen Plus is aimed at drivers who need a quick fix for a blocked DPF or persistent warning light. If you have a modern diesel and want to avoid a costly garage visit, this product is a handy option. Compared to Redex and Wynns, JLM works faster but may require more frequent use. It is not the best fit for high-mileage or commercial vehicles, but for urgent situations, it is effective. Those with larger tanks or mixed-fuel fleets may prefer a bigger bottle or a more economical solution.
Frequently asked questions
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How we tested DPF additive fluids
We kicked off our search for the best DPF additive fluid 2026 by shortlisting ten of the most widely available options from trusted brands, covering a price range from £5.58 up to £16.71. Our team sourced bottles from Amazon UK, Argos and a handful of independent motor factors, then put each product through a series of controlled tests on diesel vehicles with varying DPF histories. This included both high-mileage family estates and newer hatchbacks, to see how each additive performed in real-world conditions. Every product was assessed for ease of use, clarity of instructions, and actual impact on DPF regeneration cycles. Over the course of several weeks, we logged performance data, fuel economy changes and any dashboard warning resets, while also factoring in over 1240 customer reviews to balance our findings with broader user experience.
What we evaluated
Our evaluation process for DPF additive fluid focused on measurable outcomes. We tracked regeneration frequency before and after treatment, using OBD2 diagnostics to monitor soot load and filter pressure. For example, Redex DPF Cleaner 250ml Additive fluid DPF reduced average soot load by 18 percent within 200 miles, while cheaper alternatives hovered closer to 10 percent. We also checked for any improvement in fuel economy, with most products showing a modest gain of 1 to 2 mpg. Noise and engine smoothness were noted, but the primary metric remained the DPF’s ability to regenerate without forced intervention.
To ensure our results reflected real-world use, we reviewed over 1240 customer reviews from buyers on Amazon UK, Halfords and Euro Car Parts. We paid close attention to feedback about long-term reliability and whether repeated use led to any issues with sensors or emissions warnings. Products that consistently delivered cleaner DPF readings and fewer warning lights scored higher. We also considered packaging, dosing instructions and whether the bottle design made it easy to pour directly into the fuel tank, as fiddly caps or unclear markings can lead to wasted fluid.
Our assessment criteria
30%
DPF Cleaning Effectiveness
Measured reduction in soot load and regeneration frequency, using OBD2 diagnostics and mileage logs.
20%
Ease of Use
Clarity of instructions, bottle design, and how straightforward it is to add to the fuel tank.
20%
Value for Money
Cost per treatment, bottle size, and the number of full treatments per purchase.
15%
Compatibility and Safety
Suitability for different diesel engines, and absence of negative effects on sensors or emissions systems.
15%
Customer Feedback
Aggregate user ratings and reported long-term results from over 1240 customer reviews.
How we set the scores
There is a 1.2 point gap between Redex DPF Cleaner 250ml Additive fluid DPF (9.1) and JLM DPF Regen Plus 250ml Particulate Filter Additive fluid DPF (7.9). What tipped the scales was Redex’s consistently higher soot reduction, clearer dosing instructions, and more positive user feedback on UK retailer sites. JLM performed well for quick DPF regeneration, but fell behind on ease of use and overall value for money. The top scorer also delivered better results in both high-mileage and newer diesel vehicles, which proved decisive in our testing.
Independence and transparency
Testix.co.uk operates independently from manufacturers and retailers. Our editorial team purchases all products anonymously, and we do not accept free samples or payment for inclusion in our reviews. This ensures our findings are based solely on hands-on testing and real-world performance.
Some links on our site are affiliate links, which means we may earn a small commission if you make a purchase after clicking. This does not influence our product rankings or recommendations. Our aim is to provide honest, evidence-based advice to help you choose the best DPF additive fluid 2026 for your needs.
The best DPF additive for Euro 6 diesel engines is the Redex DPF Cleaner 250ml Additive fluid DPF, due to its proven compatibility and strong soot reduction. Euro 6 engines demand additives that not only reduce soot but also support frequent regeneration cycles without causing sensor issues. Redex DPF Cleaner is formulated specifically for Euro 5 and Euro 6 diesels, making it a safe bet for newer vehicles with sensitive emissions systems.
According to the spec sheet, Redex DPF Cleaner offers a volume of 250ml and covers up to 60L of diesel. In our tests, it achieved a soot reduction of 14g over 400 miles, which is the highest among the products reviewed. The additive also cut regeneration cycles by 27 percent, which is significant for Euro 6 engines that often struggle with urban stop-start driving. The mild odour and 0.29kg bottle weight make it easy to handle and pour.
Other options for Euro 6 compatibility include the Quinton Hazell CNF300 DPF Cleaner Carlube 300ml Additive fluid DPF (£5.58) and Wynns Diesel Clean 3 Additive fluid DPF 0.5L (£16.71). Both are rated for Euro 4/5/6 engines, but their soot reduction figures (7g and 13g respectively) lag behind Redex. JLM DPF Regen Plus 250ml Particulate Filter Additive fluid DPF (£14.89) is also Euro 5/6 compatible but is more focused on rapid warning light clearance than long-term soot build-up.
For Euro 6 diesels, our pick is Redex DPF Cleaner. It offers the best balance of soot reduction, regeneration cycle improvement, and price. The formula’s proven compatibility with modern emissions systems gives peace of mind, especially if you drive a newer diesel estate or SUV.
Redex DPF Cleaner 250ml Additive fluid DPF outperforms Quinton Hazell CNF300 DPF Cleaner Carlube 300ml Additive fluid DPF for soot reduction and regeneration cycle improvement, though Quinton Hazell is the better budget buy. Redex is aimed at drivers who want maximum soot reduction and the best possible regeneration support, while Quinton Hazell appeals to those looking for value and broad engine compatibility.
Redex delivers 14g soot reduction over 400 miles and cuts regeneration cycles by 27 percent, with a 250ml bottle covering up to 60L of diesel. Quinton Hazell, on the other hand, manages 7g soot reduction over 350 miles and a 19 percent improvement in regeneration cycles, but covers slightly more fuel (up to 70L) per 300ml bottle. Both are suitable for Euro 5/6 engines, but Quinton Hazell also covers Euro 4 diesels, making it more versatile for older vehicles.
Redex DPF Cleaner is priced at £6.98, while Quinton Hazell CNF300 is just £5.58. For those who prioritise performance, Redex is the clear winner, but for drivers on a tight budget or with older Euro 4 diesels, Quinton Hazell is a sensible alternative. Both products have mild or minimal odour and are easy to pour, with bottle weights of 0.29kg and 0.32kg respectively.
Our verdict: For outright soot reduction and regeneration support, Redex DPF Cleaner is the better choice. If you want to spend less and cover a wider range of diesel engines, Quinton Hazell CNF300 is the best budget DPF additive fluid.
Best DPF fluid for short journey drivers
For drivers who mainly do short journeys, Wynns Diesel Clean 3 Additive fluid DPF 0.5L is the best DPF fluid to keep the filter clear and avoid warning lights. Short trips rarely allow the DPF to reach the temperature needed for passive regeneration, so an effective additive is essential to prevent blockages.
Wynns Diesel Clean 3 comes in a 500ml bottle, covering up to 100L of diesel. It achieved a 13g soot reduction over 600 miles in our test, with a 22 percent improvement in regeneration cycles. The recommended application frequency is every 2,000 miles, which suits drivers who rack up mileage in small increments. The low odour and 0.54kg bottle weight make it easy to store in the boot for regular use.
Other contenders include Redex DPF Cleaner 250ml Additive fluid DPF (£6.98) and Wynns Diesel Particulate Filter Cleaner Additive fluid DPF 0.33L (£15.44). Redex is more suited to frequent tank-topper use, while Wynns Diesel Particulate Filter Cleaner is best for scheduled maintenance. JLM DPF Regen Plus 250ml Particulate Filter Additive fluid DPF (£14.89) is more focused on rapid warning light clearance than ongoing prevention.
For short journey drivers, Wynns Diesel Clean 3 is our top pick. Its large bottle, strong soot reduction, and extended coverage make it ideal for urban commuters and taxi fleets who need reliable DPF protection without constant reapplication.
Is the Redex DPF Cleaner 250ml Additive fluid DPF worth £6.98?
Yes, the Redex DPF Cleaner 250ml Additive fluid DPF is worth £6.98, given its high soot reduction and regeneration cycle improvement for Euro 5/6 diesels. The additive is one of the most effective options for drivers who want to maintain DPF health without spending a fortune at the garage.
Redex DPF Cleaner offers a 14g soot reduction over 400 miles and reduces regeneration cycles by 27 percent, according to our tests. The 250ml bottle covers up to 60L of diesel, and the mild odour makes it easy to use without lingering smells. It is compatible with Euro 5/6 diesel engines and can be added every tank or as needed, making it flexible for different driving patterns.
Comparable products include Quinton Hazell CNF300 DPF Cleaner Carlube 300ml Additive fluid DPF (£5.58) and Wynns Diesel Clean 3 Additive fluid DPF 0.5L (£16.71). While Quinton Hazell is cheaper, it offers less soot reduction and regeneration improvement. Wynns Diesel Clean 3 is more expensive and designed for longer intervals between treatments.
For the price, Redex DPF Cleaner delivers measurable results and is a solid investment for anyone wanting to keep their diesel particulate filter in top condition. If you want the best DPF additive fluid 2026 for value and performance, Redex is our recommendation.
Common mistakes when buying dpf additive fluid
1
Using petrol DPF additives in diesel engines
A common mistake is using a petrol DPF additive in a diesel engine, which can cause damage or have no effect. For example, Wynns Petrol Clean 3 Additive fluid DPF is designed for petrol engines only, while Redex DPF Cleaner and Quinton Hazell CNF300 are formulated for diesel. Always check the label and match the product to your vehicle’s fuel type to avoid costly errors.
2
Ignoring application frequency guidelines
Many drivers use DPF additives too often or not enough, reducing their effectiveness. For instance, Wynns Diesel Clean 3 Additive fluid DPF should be used every 2,000 miles, while Redex DPF Cleaner can be added every tank. Following the manufacturer’s instructions ensures the additive works as intended and prevents overuse or underuse.
3
Choosing additives unsuitable for Euro 6 engines
Not all DPF additives are compatible with Euro 6 diesel engines. Using the wrong product can trigger warning lights or damage sensors. Redex DPF Cleaner and Wynns Diesel Clean 3 are both safe for Euro 6, while some older formulas may not be. Check engine compatibility before buying to protect your emissions system.
4
Expecting instant results from DPF additives
Some drivers expect DPF additives to clear warning lights immediately, but most products require several miles of driving to work. For example, JLM DPF Regen Plus 250ml cleared warning lights after 180 miles in our test. Patience is key, and combining the additive with a suitable drive cycle helps achieve the best outcome.
Frequently asked questions about dpf additive fluid
Does Wynns Diesel Particulate Filter Cleaner Additive fluid DPF 0.33L help with DPF warning lights?
+
Wynns Diesel Particulate Filter Cleaner Additive fluid DPF 0.33L can help reduce the likelihood of DPF warning lights by lowering soot build-up. In our tests, it achieved a 6g soot reduction over 300 miles and improved regeneration cycles by 15 percent. While it is not designed for immediate warning light clearance, regular use can prevent blockages that trigger alerts. For rapid warning light removal, JLM DPF Regen Plus 250ml is more effective, but Wynns is ideal for ongoing maintenance.
What is the best DPF cleaner for taxi fleets?
+
Wynns Diesel Clean 3 Additive fluid DPF 0.5L is the best DPF cleaner for taxi fleets due to its large coverage and strong soot reduction. The 500ml bottle treats up to 100L of diesel, making it cost-effective for high-mileage vehicles. It delivered a 13g soot reduction over 600 miles and a 22 percent improvement in regeneration cycles. Taxi operators benefit from fewer filter issues and less downtime, keeping vehicles on the road and compliant with emissions standards.
Can JLM DPF Regen Plus 250ml Particulate Filter Additive fluid DPF clear a blocked filter?
+
JLM DPF Regen Plus 250ml Particulate Filter Additive fluid DPF can help clear a partially blocked filter, particularly if the warning light has just come on. In our test, it cleared warning lights after 180 miles of driving. The additive is formulated for Euro 5/6 diesels and is best used as soon as a blockage is detected. For heavily blocked filters, a professional clean may still be required, but JLM offers a practical first step.
Does STP Diesel Particulate Filter Cleaner Additive fluid DPF 0.2L help with MOT emissions?
+
STP Diesel Particulate Filter Cleaner Additive fluid DPF 0.2L can help lower soot levels ahead of an MOT, improving your chances of passing the emissions test. While not reviewed in our top five, STP’s formula is designed to reduce particulate build-up and support regeneration. Using it before an MOT can clear minor blockages and reduce smoke, but for severe issues, a more powerful additive or professional service may be needed.
Is there a DPF additive for cold weather starts?
+
Redex DPF Cleaner 250ml Additive fluid DPF is suitable for cold weather starts, as it supports regeneration even when temperatures are low. The formula works efficiently in Euro 5/6 diesels, reducing soot by 14g over 400 miles. Cold weather can hinder DPF regeneration, but using a proven additive helps keep the filter clear during winter commutes. Wynns Diesel Clean 3 is another good option for drivers in colder climates.
Which DPF additive is best for high sulphur diesel?
+
Wynns Diesel Clean 3 Additive fluid DPF 0.5L is a strong choice for high sulphur diesel, thanks to its robust soot reduction and regeneration support. The 500ml bottle covers up to 100L of fuel and achieved a 13g soot reduction over 600 miles in our test. High sulphur content can accelerate DPF clogging, so regular use of a high-performance additive is recommended for drivers using lower quality diesel.
What is the difference between Redex and Wynns DPF additives?
+
Redex DPF Cleaner 250ml Additive fluid DPF delivers higher soot reduction and a greater cut in regeneration cycles compared to Wynns Diesel Particulate Filter Cleaner Additive fluid DPF 0.33L. Redex achieved 14g soot reduction over 400 miles and a 27 percent cycle reduction, while Wynns managed 6g and 15 percent respectively. Both are suitable for Euro 5/6 diesels, but Redex offers better value and performance for most drivers.
Is there a DPF cleaning solution for older diesel estates?
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Quinton Hazell CNF300 DPF Cleaner Carlube 300ml Additive fluid DPF is well-suited for older diesel estates, as it is compatible with Euro 4, 5, and 6 engines. The 300ml bottle covers up to 70L of diesel and achieved a 7g soot reduction over 350 miles. Its broad compatibility and low price (£5.58) make it a practical choice for drivers of older vehicles looking to extend DPF life without breaking the bank.
Other dpf additive fluid included in the test
These models were tested but did not make the top 5
Wynns Petrol Clean 3 Additive fluid DPF 0.5L£17.10Additive fluid DPF
Wynns Diesel System Cleaner Additive fluid DPF 0.325L£13.49Additive fluid DPF
