Abstract: An additive composition for a fuel oil composition and that is free of polycyclic carboxylic acids and of acid derivatives thereof comprises an additive that comprises one or more monocarboxylic acids, each having from 10 to 24 carbon atoms, or acid derivatives thereof, optionally in combination with one or both of an anti-oxidant additive and an anti-static additive.

Abstract: An additive composition for a fuel oil composition and that is free of polycyclic carboxylic acids and of acid derivatives thereof comprises an additive that comprises one or more monocarboxylic acids, each having from 10 to 24 carbon atoms, or acid derivatives thereof, optionally in combination with one or both of an anti-oxidant additive and an anti-static additive.

Abstract: Oils having improved low temperature properties and additives for use therein.

Abstract: Specific polymers of ethylene and different unsaturated esters provide oils with improved low temperature flow properties.

Abstract: There are disclosed fuel compositions containing an additive formed by admixture of (i) at least one ethylene polymer, (ii) the product of the condensation reaction between an aldehyde or ketone or reactive equivalent thereof and at least one compound comprising one or more aromatic moieties having at least one substituent of the formula XR1 and one further substituent R2 wherein X is oxygen of sulfur, R1 is hydrogen or a moiety bearing at least one hydrocarbyl group and R2 represents a hydrocarbyl group and (iii) at least one oil soluble polar nitrogen compound different from the condensation product and having one or more substituents of the formula NR13 where R13 represents a hydrocarbyl group containing 8 to 40 carbon atoms.

Abstract: Specific polymers of ethylene and different unsaturated esters provide oils with improved low temperature flow properties.

Abstract: Hydrocarbon liquids obtained from the isomerization of slack wax have been found to be superior carrier fluids for additives (e.g., detergents) used in gasolines. They produce reduced amounts of engine deposit and mitigate any tendency to cause or promote valve sticking.

Abstract: Additives for distillate fuel are a copolymer of (1) an alpha olefin having two to seventeen carbon atoms per molecule or an aromatic substituted olefin having eight to forty carbon atoms per molecule and (2) a mono- or di-alkyl fumarate, itaconate, citraconate, mesaconate, trans- or cis-glutaconate, in which the alkyl group has 8 to 23 carbon atoms.

Abstract: Compositions comprising an ethylene-.alpha.-olefin copolymer, an ethylene-unsaturated ester copolymer, and a comb polymer improve the low temperature properties of fuel oils, especially high wax content oils.

Abstract: The use as an additive to improve the low temperature properties of distillate fuels having a cloud point (wax appearance temperature) above 0.degree. C. and containing more than 5 wt. % wax at 10.degree. C. below the cloud point (wax appearance temperature) of a mixture of a comb polymer together with a poly-alkyl ester, ether, ester/ether of a polyhydroxy compound.