Liqui moly 3725 biodiesel additive 250ml liqui moly 3725 p this biodiesel additive 250ml from liqui moly has been developed to clean the entire fuel system for all diesel vehicles including those with state of the art diesel oxidation catalytic converters p p p p ideal for preventing seizing and gumming up of nozzle needles while guarding against corrosion and age induced deposits this additive also combusts more efficiently allowing consumption to be reduced can be added to fuel