Effective dispersants for use in compression ignition fuels are described as arecompression ignition fuels containing such dispersants. The invention includes a fuelcomposition comprising: (a) a compression-ignition internal combustion fuel; and (b) aMannich dispersant additive formed from: (1) at least one alkyl-substitutedhydroxyaromatic compound; (2) at least one aldehyde; (3) a primary or secondary amine;wherein the ratio of the alkyl-substituted hydroxyaromatic compound to the aldehyde isin the range of from 1:1.25 to about 1:2; and wherein the ratio of the alkyl-substitutedhydroxyaromatic compound to the amine is in the range of from about 1:1.25 to about1:2.
展开▼
