Abstract: A detergent additive composition for diesel fuel contains a low molecular weight polyisobutylene monosuccinimide of polyethylene polyamine in an aromatic hydrocarbon diluent. The detergent additive composition may be used to remove or prevent engine deposits and their corrosive effects.

Abstract: A lubricating oil composition comprising(1) a major portion of a lubricating oil of a base oil viscosity, and(2) a minor portion of an antioxidant-dispersant lubricating additive prepared by the process comprising:(a) reacting a polyethyleneamine with an alkenylsuccinic acid anhydride to form a mono- and/or bis-alkenylsuccinimide;(b) adding to said mono-and/or bis-alkenylsuccinimide, a bis(hydroxyaromatic) substituted carboxylic acid and, optionally, another acylating agent to form an acylated mono-and/or bis-alkenylsuccinimide;(c) recovering said acylated mono-and/or bis-alkenylsuccinimide.

Abstract: A continuous method of preparing an overbased calcium sulfonate which comprises repeating the following steps until a desired TBN is obtained, said method comprising: (a) contacting Ca (OH).sub.2 and methanol with a normal calcium sulfonate hydrocarbon solution to solubilize at least a portion of the Ca(OH).sub.2 ; (b) filtering the sulfonate solution to separate and remove the non-solubilized Ca(OH).sub.2 from the solubilized Ca(OH).sub.2 contained in an obtained sulfonate filtrate; (c) treating said sulfonate filtrate with gaseous CO.sub.2 to convert the solubilized CA(OH).sub.2 to solubilized CaCO.sub.3 ; (d) blowing said solubilized CaCO.sub.3 with an inert gas to remove therefrom any excess CO.sub.2 and the aqueous phase generated therein to obtain an overbased sulfonate liquid; (e) adding more of said normal calcium sulfonate solution to said overbased sulfonate liquid and contacting said overbased sulfonate liquid with said non-solubilized Ca(OH).sub.2 and additional fresh Ca(OH).sub.

Abstract: Lubricants with enhanced viscosities are made from additives by combining dispersant viscosity index polymer, like dispersancy-substituted polyolefins, and detergent, like overbased, oil-soluble, metal salts, before adding dispersant package.

Abstract: Lubricants with enhanced viscosities are made from additives by combining dispersant viscosity index improver, like dispersant nitrogen-substituted polyolefins, and detergent, like select overbased, oil-soluble, metal salts, before adding dispersant package.

Abstract: An improvement is provided in a process for making a calcium sulfonate wherein a calcium base/calcium sulfonate mixture is mixed, stirred, reacted with CO.sub.2, and filtered to produce the sulfonate product. The improvement comprises stirring the calcium base/calcium sulfonate mixture at variable speeds over a sufficient length of time, whereby the product's filterability is enhanced and viscosity reduced.

Abstract: A method of preparing a amorphous metal sulfonate detergent for lubricants. The sulfonate detergent is prepared by:(a) mixing, stirring and heating a diluted metal sulfonate with Ca(OH).sub.2 ;(b) adding to the stirred, heated sulfonate mixture a sufficient amount of CO.sub.2 to heat with all the Ca(OH).sub.2 added;(c) adding a zeolite to the mixture partway through the addition of CO.sub.2 to remove a certain percentage of the total water in said mixture;(d) filtering the water-removed mixture to separate an amorphous metal sulfonate product; and(e) recovering the amorphous overbased metal sulfonate product.