I would be highly suspicious of the effects of this device. If it is a filter, as identified, then the fuel
passing through, known as the filtrate, should leave behind what is not able to pass the filter. If you do not have a collection of material that remains in the device that needs to be periodically removed; then, there is no filtration occuring! If the device is advertised as killing microbes as they are headed for the combustion within your engine
, and not filtering them; I would question how the diesel engine
would respond differently combusting microbes that are dead instead of alive.