A composition including a pyrolysis oil and, as an additive, one or more of: (a) an aldehyde-alkylphenol copolymer and/or an aldehyde-alkylphenol-polyamine copolymer, wherein the alkylphenol of the copolymer comprises an alkyl group having at least 30 carbon atoms; and (b) the reaction product of an alcohol and/or amine with a copolymer of an alpha-olefin and an ethylenically unsaturated carboxylate compound, wherein the alpha-olefin and/or the alcohol and/or amine has at least 30 carbon atoms. A method of reducing the pour point of a composition including a pyrolysis oil and a use of the aforementioned additives for reducing the pour point of a composition comprising a pyrolysis oil, are also disclosed.

A compound represented by the formula:

##STR00001## wherein R is selected from the group consisting of (i) substituted or unsubstituted alkyl with C=0 to 12 inclusive; (ii) substituted or unsubstituted aryl; and (iii) substituted and unsubstituted alkylaryl; wherein X.sup.1, X.sup.2, X.sup.3 and X.sup.4 are each selected from the group consisting of alkyl, aryl, alkylaryl groups and hydrogen; wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each selected from the group consisting of alkyl, aryl, alkylaryl groups and hydrogen and R.sup.2 and R.sup.3 may optionally be bridged by a polymethylene group; wherein when C=0 in R, the combined group R.sup.1 R.sup.2 is the same as the combined group R.sup.3 R.sup.4; and wherein when C=1 in R, each of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are hydrogen.

A compound represented by the formula:

##STR00001## wherein R is selected from the group consisting of (i) substituted or unsubstituted alkyl with C=0 to 12 inclusive; (ii) substituted or unsubstituted aryl; and (iii) substituted and unsubstituted alkylaryl; wherein X.sup.1, X.sup.2, X.sup.3 and X.sup.4 are each selected from the group consisting of alkyl, aryl, alkylaryl groups and hydrogen; wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each selected from the group consisting of alkyl, aryl, alkylaryl groups and hydrogen and R.sup.2 and R.sup.3 may optionally be bridged by a polymethylene group; wherein when C=0 in R, the combined group R.sup.1 R.sup.2 is the same as the combined group R.sup.3 R.sup.4; and wherein when C=1 in R, each of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are hydrogen.

Gasoline fuel composition suitable for use in an internal combustion engine comprising: (a) Fischer-Tropsch derived naphtha at a level from 2 to 20% v/v; (b) at least one aromatic octane booster present at a level of 0.75 to 8% v/v or less; and (c) a gasoline base fuel; wherein the gasoline fuel composition comprises 40% v/v or less of aromatics. In a preferred embodiment, the Research Octane Number (RON) of the gasoline fuel composition is increased while maintaining the aromatic content of the gasoline fuel composition at a level of 40% v/v or less, based on the gasoline fuel composition.

Gasoline fuel composition suitable for use in an internal combustion engine comprising: (a) Fischer-Tropsch derived naphtha at a level from 2 to 20% v/v; (b) at least one aromatic octane booster present at a level of 0.75 to 8% v/v or less; and (c) a gasoline base fuel; wherein the gasoline fuel composition comprises 40% v/v or less of aromatics. In a preferred embodiment, the Research Octane Number (RON) of the gasoline fuel composition is increased while maintaining the aromatic content of the gasoline fuel composition at a level of 40% v/v or less, based on the gasoline fuel composition.

Aviation fuel formulations receive many benefits when a manganese-containing additive is incorporated in that composition. However, to the extent that the use of a manganese-containing compound may result in the formation of engine deposits during combustion, it is beneficial to further provide a scavenger compound to the fuel composition. This scavenger compound may include a phosphorus-containing compound, an organobromide compounds, and/or a tricarbonyl compound.

A carrier fluid or fluidizer for use in fuel performance additives or fuels including such additives is described herein. The novel carrier fluids include a unique blend of alkoxylated alcohols or polyols providing unexpected performance improvements to fuel performance additives and fuels incorporating the additives. The carrier fluids, when combined with at least a detergent, provide desired valve stick performance and unexpectedly improve the intake valve deposit performance at the same time.

While some triazines have low reactivity, a method and composition is described for improving their reactivity. The H.sub.2S scavenging composition and method utilizes a tertiary amine to catalyze the scavengers with slower kinetics to achieve improved results over traditional systems with the scavenger alone. A hydrogen sulfide scavenging composition comprises: a tertiary amine as a catalyst in at least one of (i) a triazine scavenger selected from the group consisting of: methyl amine, C2-C5 alkyl amine, dimethylaminopropylamine, isopropanolamine, aniline, cyclohexylamine, isobutanolamine and methoxypropylamine triazines/bisoxazolidines; or (ii) an aldehyde-based scavenger such as glyoxal.

While some triazines have low reactivity, a method and composition is described for improving their reactivity. The H.sub.2S scavenging composition and method utilizes a tertiary amine to catalyze the scavengers with slower kinetics to achieve improved results over traditional systems with the scavenger alone. A hydrogen sulfide scavenging composition comprises: a tertiary amine as a catalyst in at least one of (i) a triazine scavenger selected from the group consisting of: methyl amine, C2-C5 alkyl amine, dimethylaminopropylamine, isopropanolamine, aniline, cyclohexylamine, isobutanolamine and methoxypropylamine triazines/bisoxazolidines; or (ii) an aldehyde-based scavenger such as glyoxal.

Disclosed herein are antifouling compositions including a combination of one or more dispersant polymers and one or more inhibitors, the one or more dispersant polymers including the polymerized residues of one or more -olefins and maleic anhydride, further wherein the maleic anhydride residues are reacted with a primary amine; and the one or more inhibitors including a functionalized p-phenylene diamine. Concentrates of the antifouling compositions in solvents are stable and pourable at temperatures of 0 C. to 40 C. The antifouling compositions are added to a petroleum product to form a treated petroleum product, wherein fouling by the treated petroleum product is reduced and a stable dispersion is formed over a wide range of processing conditions.