Marine diesel fuel compositions and methods of operating marine diesel engines

Claim 1

IN THE METHOD OF OPERATING A MARINE DIESEL ENGINE, WHEREIN A MEDIUM DIESEL FUEL CONTAINING A CORROSION CAUSING AMOUNT OF SEA WATER IS INJECTED BY FUEL INJECTORS INTO THE CYLINDERS OF THE ENGINE FOR COMPRESSION IGNITION AND COMBUSTION THEREIN, THE COMBINATION THEREWITH OF THE IMPROVEMENT COMPRISING IN INJECTING INTO SAID CYLINDERS A DIESEL FUEL COMPRISING A MAJOR AMOUNT OF A MEDIUM DIESEL FUEL SUBJECT TO SALT WATER EMULSIFICATION, AND CONTAINING ABOUT 0.001 TO ABOUT 0.1 PERCENT BY WEIGHT OF THE COMPOSITION OF A SUBSTANTIALLY NEUTRAL SALT OF A PRIMARY N-ALKYL AMINE CONTAINING 8 TO 18 CARBON ATOMS PER MOLECULE AND A DIALKYL ACID ORTHOPHOSPHATE WHOSE ALKYL GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF 3METHYLBUTYL, 2-ETHYLHEXYL, OXO AMYL AND OXO OCTYL RADICALS, THE AMOUNT OF SAID SALT BEING SUFFICIENT TO IMPART SALT WATER CORROSION INHIBITING PROPERTIES TO THE FUEL.