i work for europes largest truck/bus DPF supplier.
if its just a filter it is quite possible to clean them , by putting them in an oven at 600'c for a few hours to burn all the soot off .
if the vehicle has a cat in before the DPF then , the situation is helped , but thats not always the case. soot builds up even if the filter has regenerated - it then needs cleaning or replacement .
you can only clean a filter a certain number of times - after that it needs replacement .
to help regeneration - some models use a catalayst added into the fuel to lower the temperature of regeneration , you could also try fitting a pre heater in the exhaust .
the other option is bi fuel .
Another is contacting me and seeing if we can help with the situation .
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