| abstract |
(57) [Abstract] [PROBLEMS] For light oil, particularly light oil having a reduced sulfur content, the deposits on the injection nozzle of a compression ignition diesel engine are reduced, the lubrication characteristics of the light oil are improved, and the wear of a fuel injection pump is improved. A gas oil additive effective for preventing the above is provided. A gas oil additive comprising a salt of a carboxylic acid and an aliphatic amine, or an amide obtained by dehydration condensation of a carboxylic acid and an aliphatic amine. This light oil additive is used by adding it to light oil in an amount of about 1% by weight or less. |