HYDROCARBYLPHENOLS AS INTAKE VALVE CLEAN-UP BOOSTERS

摘要

The present invention relates to a fuel additive composition comprising polyisobutenyl monoamines or polyamines as nitrogen-containing dispersants, synthetic or mineral carrier oils which are substantially free of nitrogen, and hydrocarbylphenols with long-chain hydrocarbyl residues. Furthermore, it relates to a gasoline fuel composition comprising a minor amount of this fuel additive composition. Furthermore, it relates to the use of such long-chain hydrocarbylphenol as an intake valve clean-up booster in internal combustion engines operated with gasoline containing the above detergents and the carrier oils.