GASOLINE ADDITIVES

摘要

The invention provides the use of an effective concentration of a hydrocarbyl amine wherein the hydrocarbyl moiety has a number average molecular weight in the range 140 to 255 as an additive in an unleaded gasoline composition comprising a major proportion of a gasoline suitable for use in a spark ignition engine, for reducing injector nozzle fouling in a direct injection spark ignition engine; an unleaded gasoline composition suitable for such use; and a method of operating a direct injection spark ignition engine.