Abstract: Lubricating oils of improved wear resistance and dispersancy are prepared containing borate esters of hydrocarbyl-substituted mono- and bis-succinimides containing polyamine chain linked hydroxyacyl groups.

Abstract: Dispersant additives in lubricating oils are formed by reaction of polyacids such as 1,3,6-hexane tricarboxylic acid and polyisobutenyl succinimide of a polyamine.

Abstract: A middle distillate such as diesel fuel of improved storage stability contains an acylated condensate of an alkenyl succinic acid anhydride and a Mannich condensate.

Abstract: A lubricant composition comprising a major amount of a lubricating oil and an effective dispersant amount of both a hydrocarbyl-substituted mono- and bis-succinimide having polyamine chain linked hydroxyacyl radicals, and a polyol derivative prepared by contacting an aliphatic polyolefin with P.sub.2 S.sub.5 in the presence of sulfur and P.sub.2 S.sub.5, contacting the resultant polyolefin-P.sub.2 S.sub.5 reaction product with a steam, removing inorganic phosphorus acid from the steam treated polyolefin P.sub.2 S.sub.5 reaction product, and contacting the polyolefin P.sub.2 S.sub.5 reaction product with a neopentyl polyol. The combination of succinimide and polyol derivative exhibit enhanced dispercancy and/or detergency over either additive alone.

Abstract: The detergent properties of a motor fuel are improved by incorporating therein a minor amount of a succinimide oxamide prepared by reacting a polyalkyleneamine succinimide with an amount of oxalic acid sufficient to react with at least 30 percent of the reactive nitrogen moieties on the succinimide chain.

Abstract: Diesel oil of improved storage stability contains condensate of tetraethylenepentamine; paraformaldehyde; 2,6-di-t-butyl phenol; and polyisobutenyl succinic acid anhydride.

Abstract: A hydrocarbyl-substituted mono- and bis-succinimide having polyamine chain linked hydroxyacyl radicals represented by the formula: ##STR1## in which R is a hydrocarbyl radical having from about 8 to 400 carbon atoms, X is a divalent alkylene or secondary hydroxy-substituted alkylene radical having from 2 to 3 carbon atoms, A is hydrogen or a hydroxyacyl radical from the group consisting of glycolyl, lactyl, 2-hydroxymethyl propionyl and 2,2'-bis-hydroxymethyl propionyl radicals and in which at least 30 percent of said radicals represented by A are said hydroxyacyl radicals, x is a number from 1 to 6, and R' is a radical selected from the group consisting of --NH.sub.2, --NHA, or a hydrocarbyl substituted succinyl radical having the formula: ##STR2## in which R and A have the values noted above, and a hydrocarbon oil composition containing same are provided.

Abstract: A process for stabilizing fuels during storage by blending therewith oxalic acid derivatives of mono- or bis-succinimides of polyalkylpolyamines. The fuels are stabilized by the presence of 10 to 100 parts per thousand barrels of these oxamides. For particular applications mixtures of mono- and bis-succinimides in varying proportions can be used.