When converting to fossil free fuel, the storage tank and the vehicle tank must be drained completely, as these can contain free water. This is especially important if you have chosen B100 Biodiesel RME. If you have been driving on fossil diesel for a long time, we recommend ordering cleaning of the tank to avoid bacterial growth and operating problems.
Apply water finding paste to a dipstick and check if the paste becomes discoloured. Water finding paste can be purchased on various websites. Make sure that the gasket in the manway cover is whole and intact. See more about it here.