Abstract: Polymeric step ladder polysuccinimide compositions prepared by coupling the polyamine segments of polyalkenyl succinimides with dicarboxylic acids are useful as improved lubricating oil dispersants which are more compatible with engine seals made of synthetic rubbers such as Viton.RTM. than existing additives.

Abstract: An improved process for the preparation of sulfurized overbased alkaline earth metal phenates comprises steps of:(a) sulfurizing an alkylphenol with a sulfur halide in an alkane solvent;(b) neutralizing the sulfurized alkylphenol with an alkaline earth metal compound in a mixed solvent comprising an alkane and a lower alkanol to produce a sulfurized alkaline earth metal phenate;(c) carbonating said phenate with carbon dioxide to produce an overbased phenate; and(d) filtering and solvent stripping the reaction mixture to recover the phenate product.The products have a high degree of sulfurization with a substantial portion of monosulfide bonds and are substantially free from alkylene oxide residues.

Abstract: A novel diluent composition for handling fuel additives comprising a mixture of hydrocarbons in the avjet boiling range in combination with primary amyl alcohol.

Abstract: Gasoline of reduced combusiton chamber deposits attained by addition of, as an additive, a reaction product of alpha-hydroxy omega hydroxy-poly (oxyethylene) poly (oxypropylene) poly (oxyethylene) block copolymer, maleic anhydride and N-tallow-1,3-propane diamine.

Abstract: Gasoline of reduced combustion chamber deposit attained by addition of, as additive, a reaction product of polyoxyisopropylenediamine-maleic anhydride-N-tallow-1,3-propane diamine.

Abstract: Gasoline of reduced combustion chamber deposit attained by addition of, as additive, a reaction product of polyoxyisopropylenediamine-polyalkylene polyamine-maleic anhydride.

Abstract: Provided is a Mannich reaction product prepared by reacting malonic acid, formaldehyde and an amine, wherein the amine is represented by the formula: R--NH.sub.2, and R--NH--CH.sub.2 --CH.sub.2 --CH.sub.2 --NH.sub.2, in which R is a hydrocarbyl radical having from about 6 to 20 carbon atoms, and, also, a motor fuel composition containing the same that is non-corrosive and non-fouling.

Abstract: The invention relates to a novel compound comprising the reaction product of a benzophenonetetracarboxylic dianhydride or a benzophenonetetracarboxylic acid, in particular, 3,3'4,4'-benzophenonetetracarboxylic dianhydride, and a polyol, and the use of this novel compound as a stabilizer for middle distillate fuels extended with non-petroleum distillates.

Abstract: Avjet fuel, extended with shale oil distillate boiling in the diesel fuel boiling range, is improved with respect to thermal stability by addition of 0.