| abstract |
A fuel composition for a direct fuel injected diesel engine, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for a diesel engine. The fuel composition includes a major amount of fuel and a minor, effective amount of a quaternary ammonium salt having a thermogravimetric analysis (TGA) weight loss of greater than 50 wt.% at 350° C. The amount of quaternary ammonium salt present in the fuel is sufficient to improve performance of the direct fuel injected diesel engine having combusted the composition (by reducing deposits) by improving the injector performance of the engine by at least 80% when measured according to a CEC F98-08 DW10 test. The usual additives may be present. |