Wynn's Diesel Particulate Filter Cleaner - Heavy-Duty Cleaning for Severely Blocked DPFs - Restores Optimal Pressure Levels & Engine Performance - Biodegradable Formula - 5L

Great product happy with the result

Cleared the blocked dog on my van after soaking overnight. Breaks down ash well. Much cheaper than garage options. A lot of foam will come out of your exhaust when you first start the engine after cleaning. Seems to clear within a few mins and has been fine since

Although this stuff worked I don’t actually know how effective it is vs other detergents. Seemed to get lots of black muck out the DPF, but would fairy liquid/white spirit/petrol work just as well? Who knows, but for £27 I wasn’t going to go through the faff of taking the PDF off and not using a specialised cleaner.

I used this on a blocked Transit van DPF with a soot content of 350%, I blanked off the inlet side of the DPF and all the pipes and holes then filled it up from where the exhaust would normally exit and left it for 2 days soaking and only agitated it 4 times over the 2 days then drained in to a bucket, back flushed it with hot water then carefully with a jet wash ( NOT A STEAM CLEANER) until the water coming out ( with agitation while draining) run clean, I let it drain out for a few days but after fitting and running there was still water in it so I let the engine dry it out on idle. the DPF differential psi is good at 6kpa but after cleaning it was 2 kpa, originally its kpa on idle was much higher and owing to the soot content at 350% the DPF needed removingI reset the soot content and done a forced regen, not one puff of smoke that's how well this cleaned the DPF ( with a good flushing)NB!!! this is great for removing soot and oil, if you need to remove ash a diluted version of brick acid or an ash cleaner will be needed, there are many YouTube videos to show various methods, but for soot and oil you will not go wrong with this product.NOTE! before following the below instructions you must ensure the readings you are getting on your diagnostic are in fact correct, and all other issues have been ruled out/ fixed. take a copy of your readings before DPF removal or trying on vehicle cleaning. <------ IMPORTANT!!!instructionRemove DPFBlock off the intake end ( the flange coming from the inlet manifold) you are flushing the DPF out in the reverse direction to which way the exhaust flowsfill with the DPF cleaner and agitate then leave it over night minimum, it says 8 hours but 24 minimum, I left mine 48 hoursDrain the chemical in to a bucket if you wish to keep it,flush with hot water ( tap water hot) use a good few gallons and as the water runs through agitate the DPF turning it 12 to 6 and then 6 to 12 and shake it up and down as the water runs through, do this until the water running through the DPF begins to run clean ( it takes a while)leave to drain over nightfit back on to the vehiclewhen fitted and running the vehicle up you will note water running out of the exhaust as the engine runs, let the engine idle for around 30 mins, while letting the engine idle use a diagnostic to check the DPF pressure differential, please check what your vehicles Pressure differential ratio is ( it is around 6kpa for a transit on idle) I had 1-2 KPA which means the DPF is very clear. 100KPA on idle is a blocked DPF, on 2000 RPM after cleaning mine read 5KPAwhen you are satisfied it is in fact clear reset the soot content( running the engine on idle till hot and revving the engine while viewing the exhaust is an indication but the DPF psi differential is the best indication.do a forced regen when you are completely satisfied your vehicle now meets the criteria!after the regen erase all the faults and restart the vehicleNow the vehicle should no longer be in limp modeif you are unsure about anything you have read I suggest you seek professional help because doing a regen with a blocked DPF can seriously damage your engine.if you have ash blockage this product will not remove the ash, this product is great for removing oil and sootI will add some pictures later

Cleaned my dpf out perfectly, only for use when removing dpf completely off the car

Bought 2 times,excellent to clean egr and pdf.Warning engine and pdf lights on dash.Unclip the intake air duct after MAP sensor and airfilter.Bring a spray bottle and point at intake air duct ,engine stay idle or 2000rpm.Wash down woth engine running with 1 liter cleaner.Run a road drive with 2000 to 3000 rpm.The engine warning light lost at first.Then after 20 monute drove in High way,the pdf warn gone.Very happy and save to garage.My 1.9TDI engine goes smooth and quiet then.

It's really works, I left my dpf overnight, filled up with this liquid. Then washed out, the result is looks new dpf all inside is turned white. Brilliant.

Basically truck wash, highly concentrated soap, feels like it, smells like it, take a tip from me, its over priced soap, use warm very soapy water and rinse in through a few times, don't put the water back through, use fresh always, worked OK for a dpf i did after using this over priced rubbish, use the jetwash at a garage on hot soap or whatever then rinse through repeatedly until it runs clear from at least 8 inch away so you dont damage anything, always wash the dpf in reverse, don't jetwash the soot and ash further into the dpf.