Wynns OFF-CAR DPF Car Diesel Engine Cleaner for manual cleaning when the DPF is too heavily blocked and standard regeneration methods fail. Suitable for heavily blocked DPFs (over 70 percent soot loading), requiring DPF removal. This in-house workshop cleaning solution involves approximately 2 hours of soak time. Compatible with Diesel and Hybrid Diesel Engines. Size: 5L. HOW TO USE: Remove the filter from the vehicle and remove the sensors. Seal the end of the filter and any openings where sensors were removed. Fill the filter with Wynns Off Car DPF Cleaner, ensuring the surface of the filter is covered. Allow to soak for 90-120 minutes. Extremely contaminated filters can be left for up to 8 hours. During soaking, the filter can occasionally be gently agitated to aid in cleaning. After soaking is complete, the filter should be emptied. Rinse the filter from both sides with warm water, ensuring that any contaminant flush is drained out from the filter, and continue until the water runs clear through all openings/apertures. Gently dry the filter using low-pressure air from an airline. Refit filter. This product cleans all types of Diesel Particulate Filter (DPF) and must be removed from the vehicle for cleaning. Brand: Wynns, Application: Cleaners / Degreasers, Type: Diesel Treatment, Type: DPF Cleaner, Vehicle Type: Car, Quantity: 5 Litres.