Update – November 2022– Interestingly, modern petrol or gasoline vehicles are now being fitted with DPF equivalent type filters. Gone are the days or buying a petrol vehicle to avoid frustrations with exhaust filter systems. Motoring product specialists such as Liqui Moly, Wynn’s and Cataclean are now producing DPF like cleaning products for petrol and gasoline cars. It’ll be interesting to observe whether PPF’s prove to be as problematic as DPF’s have been for modern Diesel engines.

Here, I provide a two-step guide to regenerating a DPF filer for pennies, without the need for a mechanic The cost of using a dedicated DPF cleaner regularly is far cheaper than the cost of a DPF repair or replacement, it’s a great preventative measure which is now an essential part of maintaining our vehicles. You need to make sure you choose the best DPF Cleaner you can afford to get the best results possible. How Long Does The DPF Cleaner Take To Work? You may notice a rough and different idle to your car engine. It may be jerky and unsteady when stationery, due to the gasses not flowing properly through the DPF filter. Campaigners are voicing complaints to the Advertising Standards Agency (ASA) regarding the spike in DPF filter removal. Such ads are deemed to be breaking the ASA code of conduct that condones practices that encourage anti-social behaviour. It’s alleged that such ads are exploiting a loophole in the law which clearly states that driving a diesel vehicle on the road without a DPF is an offence, but the actual removal of the filter is not. Because DPF filters have limited size and capacity, they can only store a limited amount of exhaust soot. Once the system has reached it’s capacity threshold (usually around 80%), the vehicle will attempt to begin a process called “Regeneration” What Is A DPF Regeneration?

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You may get a strange smell coming from the engine bay or underneath of the car. Common smells are a foul, eggy like smell and you also get a burning smell which can be alarming to say the least! The Used Car Guy holds no liability for your outcomes when trying the procedure listed above. This article is meant only to aid car owners that wish to avoid spending large amounts of money on their used car. Wait for five minutes before restarting your car to find that the DPF warning light, glow plug light or engine management light switched off!

Part of Liqui Moly’s Pro Line of products, the German branded Liqui Moly DPF cleaner takes our top spot. Liqui Moly claim it’ll dissolve hardened, dense and encrusted contaminants on the surface of diesel particulate filters ensuring optimum performance at all times. As well as restoring performance of the engine, crucially, it’ll also improve fuel consumption significantly. Liqui Moly have built up an excellent reputation for producing exemplary car care products and this DPF cleaner is arguably one of their most impressive products yet. The key features of Liqui Moly Pro Line DPF cleaner are; As well as the warning light, you’ll also likely notice a decrease in performance from your car. You may experience the following symptoms. Once you have run the car very hot for a sustained period pull over and immediately switch off the car.In a press release from 2 May 2016, FOE air pollution campaigner, Oliver Hayes, stated, “Air pollution is a public health crisis of breath-taking proportions. The dodgy practice of removing pollution filters from cars is not only risking people’s health but also putting drivers at risk of prosecution for the simple fact that it’s illegal to drive a car with its DPF removed.” DPF’s have been fitted to comply with European emissions regulations and it is illegal to alter or remove the system.

The car was running just fine, although it was drinking a lot of diesel. The only other symptom was a flashing glow plug light. If your car is suffering with a fuelling, or EGR valve system problem, it can prevent a DPF regeneration from taking place.

Yes, absolutely. The principle behind a DPF cleaner is to act as a preventative measure to help prevent major problems manifesting themselves accompanied an expensive repair bill. Using a DPF cleaner will cause no harm and even if your DPF is only very lighly full, the cleaner will improve fuel economy and engine performance. Can I Have My DPF Removed? If you only ever use your car for short journeys around town and never drive on a motorway, it’s recommended to use a DPF cleaner in every second or third tank of fuel, doing so will signifanctly reduce soot built up in the DPF. DPF cleaners are suitable for most diesel or biodiesel engines and they may require regular usage to keep the DPF clean. However, if you find that they aren’t as effective as you would expect, go on a “spirited” drive whilst keeping the RPM’s high. You could also drive on the motorway and keep the car in a lower gear whilst travelling at 60 to 70 MPH. This type of driving along with using the cleaner should help to keep it clean as long as there isn’t a fault with the DPF. Wynn’s, the US based company, have developed an outstanding reputation over many years. They produce a whole host of engine performance additives and this DPF cleaner scores highly for value for money. Impressively, this DPF cleaner is also suitable for use in biodiesel vehicles all the way up to B30. The key features of Wynn’s DPF cleaner are;

If your diesel car is fitted with a DPF, it’s imperative that you use DPF compliant engine oil. Using an oil that doesn’t meet the required specifications for your engine can result in catostrophic failure. Prior to the conception of DPF filters, those harmful exhaust gasses were being pumped straight out into the atmosphere.You can also use the DPF cleaner in conjuction with cheaper diesel as opposed to using more premium diesel fuels at each fill up. Should I Use A DPF cleaner If My Warning Light Is Not On? Motorists tend to avoid repair due to the expense of cleaning, remapping or replacing the filter, particularly if the car still runs pretty well but there is an engine warning or glow plug light flashing. Update – October 2023– We have updated our product recommendations in line with some excellent new products that have been released in the UK market. Express delivery option to offshore, highlands and remote postcodes may take longer than the usual one working day. The surcharge may not apply to small items being sent via Royal mail or MyHermes etc... Where possible we will try our best to avoid courier service for surcharge areas.