Abstract: Oil-soluble 4-alkyl mono or 5-alkyl bicyclic oxazolidines, e.g. 1-aza-3,7-dioxabicyclo[3.3.0] octanes which are the reaction products of an aldehyde and an amino propane monol or diol are additives which feature activity in functional fluids, e.g. mineral oil base automatic transmission fluids, as copper alloy corrosion inhibitors.

Abstract: Oil-soluble polyol ester reaction products of C.sub.6 -C.sub.10,000 hydrocarbon substituted C.sub.4 -C.sub.10 dicarboxylic acid materials, e.g. alkenyl succinic anhydride, have been readily produced under solution reaction conditions characterized by conducting said reaction in the presence of at least a filtration suppressing insolubles reducing amount of a hydrocarbon soluble metal salt of a hydroxy aromatic compound, e.g. an alkaline earth metal alkyl phenate or naphtholate, preferably an overbased calcium sulferized phenate whereby the filtration suppressing insolubles resulting from said reaction is markedly reduced to less than 1 vol. %, the product solution haze is less than 30 nephelos and as a consequence thereof the filtration of the reaction product solution is facilitated.

Abstract: Amine salts, amic acids, amic acid amine salts bis-amides and imides of oil-soluble thio-bis-(C.sub.12-50 alkyl lactone acid), e.g. a secondary hydrogenated tallow amide of dithio-bis-(C.sub.16 -C.sub.24 alkyl lactone carboxylic acid), are useful in combination with a coadditive hydrocarbon such as an amorphous hydrocarbon or a hydrogenated polybutadiene in improving the cold flow properties of distillate hydrocarbon oils.

Abstract: A hydrocarbon-soluble molybdenum complex of a hydrocarbon substituted thio-bis-phenol, e.g. the reaction product of 1-2 moles of nonyl phenol sulfides and one mole of molybdenum oxide (reacted if desired in the presence of an amine promoter), in combination with a sulfur donor provides lubricity activity to lubricating oils and other hydrocarbons including fuels.

Abstract: An oil-soluble molybdenum complex of an ashless polyol ester dispersant, preferably of oil-soluble reaction product of a molybdenum compound such as molybdic acid with about 1 to 2 molar equivalents of a polyol ester of a hydrocarbon substituted diacid material such as polybutenyl succinic anhydride or a thio-bis-(hydrocarbyl substituted diacid material), such as thio-bis-(polyalkyl lactone acid) and/or their precursors, the adducts of sulfur chloride and unsaturated diacid materials, e.g., 4,8-bis-polyalkyl-4,8-dichloro-6-thiaundecane-1,2,10,11-tetracarboxylic acid bis-anhydride and their dehydrochlorinated analogs, is a useful additive to a lubricating oil since both the sludge dispersant and antifriction properties of said oil are enhanced.

Abstract: Oil-soluble, derivatized ethylene copolymers derived from about 2 to 98 wt. % ethylene, and one or more C.sub.3 to C.sub.28 alpha-olefins, e.g. propylene, which are grafted, preferably solution-grafted under an inert atmosphere and at elevated temperatures and in the presence of a high-temperature decomposable free-radical initiator, with an ethylenically-unsaturated carboxylic acid material and thereafter reacted with a polyfunctional material reactive with carboxy groups; such as (a) a polyamine, or (b) a polyol, or (c) a hydroxy amine, or mixtures thereof to form carboxyl-grafted polymeric derivatives are reacted with oil-soluble hydrocarbyl substituted acids, preferably with long chain alkyl aryl sulfonic acids with an average side chain carbon number of about 20-40, to yield haze-free hydrocarbon solutions, e.g. a lubricant additives composition, of increased dispersant potency. Useful number average molecular weight (M.sub.

Abstract: Azole aminopolysulfides and azine aminopolysulfides are effective as ashless antiwear agents for lubricating oils, particularly when used in combination with an ashless dispersant.

Abstract: The low temperature filterability of a petroleum middle distillate fuel, such as a heating oil or a diesel fuel is improved by adding to the fuel a flow improving amount of wool fat and, if desired, a flow improving amount of wool fat in combination with oil-soluble, auxiliary flow-improving material such as: an alkyl aromatic, e.g., the condensation product of chlorinated wax and naphthalene; a polymer of an acrylic ester, such as polyalkyl acrylate; etc. This invention is particularly advantageous in improving the flow of a diesel fuel through a fine filter at low temperatures.