| abstract |
A diesel fuel additive composition, a fuel containing the fuel additive, a method of improving the performance of a diesel engine by using the additive. The diesel fuel additive comprises a reaction product of (a) a hydrocarbyl substituted acylating agent and (b) a reagent selected from the group consisting of a nitrogen-containing compound, a hydroxyl-containing compound and water which gives a reaction product selected from the group consisting of (1) a mono-amide / mono-acid or a metal-free diacid salt thereof, (2) a diacid or a diacid free salt metal thereof, and (3) a mono-ester / mono-acid or a metal-free mono-acid salt thereof. The reaction product comprises at least about 10 mole percent of acidic groups based on the total number of moles of reaction product. |