Treating such as curing an internal fouling of a fuel injector present in an internal combustion engine, comprises (i) mixing an amount of curative additive of the fuel injector with a fuel of the internal combustion engine, and (ii) operating the internal...

A method of reducing the particulate emissions in an internal combustion engine, said method comprising operating the internal combustion engine with a fuel composition comprising a major amount of hydrocarbons boiling in the gasoline or diesel range and a...