Abstract: A lubricating oil composition comprising a hydrocarbyl oil of lubricating viscosity, a metal-containing additive characterized by promoting the formation of hard deposits in an internal combustion engine, and a hydrocarbon-substituted succinimide represented by the formula: ##STR1## in which R is an aliphatic hydrocarbon radical having from about 1 to 50 carbon atoms and R' is a hydrocarbon radical having from 3 to 20 carbon atoms, and a method for lubricating an internal combustion engine.

Abstract: A nitrogen-boron-containing lubricant additive characterized by containing from 0.5 to 2.5 weight percent nitrogen and from 0.050 to 2.0 weight percent boron and a mineral lubricating oil composition containing same.

Abstract: In the method of preparing sulfurized, alkoxylated, inorganic phosphorus acid free, steam hydrolyzed polyalkene-P.sub.2 S.sub.5 reaction product useful as a detergent-dispersant in lubricating oil compositions of improved antioxidant and odor properties comprising contacting polyalkene and P.sub.2 S.sub.5 in the presence of a catalytic amount of sulfur to form the polyalkene-P.sub.2 S.sub.5 reaction product, contacting the resultant polyalkene-P.sub.2 S.sub.5 reaction product with steam to form an inorganic phosphorus acid containing hydrolyzed polyalkene-P.sub.2 S.sub.5 reaction product, removing inorganic phosphorus acid from the hydrolyzed polyalkene-P.sub.2 S.sub.5 reaction product, contacting the inorganic acid free, hydrolyzed polyalkene-P.sub.2 S.sub.5 reaction product with alkylene oxide, the improvement which comprises the step selected from the group consisting of 1). contacting said inorganic acid free, steam hydrolyzed polyalkene-P.sub.2 S.sub.5 intermediate product with added sulfur, and 2).