I put a bit of Cetane booster in diesel that has sat for a few months. Biocide, and a clean fuel
tank keeps the filters and injectors in good shape. Adding a 10% to 20% Kerosene mix will clean your injectors, but make sure not to do it too much and let the kerosene dry out the seals. For the fill up after add a bit of clean engine oil to your fuel
, to keep the seals in good shape.