Diesel Purge is a little can of concentrated product you use to clear impurities in the fuel system/injectors after the fuel filter. You disconnect the hoses from the filter and run your car >2k rpm using only the product from the can. This has nothing to do with DPF cleaning, but it does work for cleaning injectors IMO.
DPF Cleaning at Halfords Autocentres. If you own a diesel car then chances are you have a Diesel Particulate Filter (DPF). Any diesel engine can be susceptible to soot build-up, especially those mainly driven around town or on short or low speed journeys. DPFs are designed to remove this soot as you drive, but over time they can stop working.
M2EWnZ.