A fuel additive formulation, method of use, and method of producing the fuel additive formulation are described. The fuel additive of the present disclosure comprises a mixture of nitroparaffins comprising nitropropane and nitromethane, a lubricant, and an aromatic hydrocarbon. The fuel additive formulation is substantially free of nitroethane. The combustion in an internal combustion engine of a fuel containing the additive results in reduced emissions relative to the combustion of a fuel not containing the additive.

A fuel additive formulation, method of use, and method of producing the fuel additive formulation are described. The fuel additive of the present disclosure comprises a mixture of nitroparaffins comprising nitropropane and nitromethane, a lubricant, and an aromatic hydrocarbon. The fuel additive formulation is substantially free of nitroethane. The combustion in an internal combustion engine of a fuel containing the additive results in reduced emissions relative to the combustion of a fuel not containing the additive.

Use of an additive selected from nitrate compounds, peroxide compounds, nitrite compounds and polyether compounds, and mixtures thereof in a diesel fuel composition for reducing the build-up of deposits in an Exhaust Gas Recirculation (EGR) system of a compression ignition internal combustion engine.

An additive has been prepared for blending with gasoline that facilitates a cylinder resident reaction, in high compression internal combustion engines (ICEs), to produce an increase in engine's mechanical energy output. A method of increasing mechanical efficiency of an internal combustion engine (ICE) comprising blending an amount of additive with gasoline to perform hydrolysis of olefin hydrocarbons, represented by octene (C8) into petroleum gas hydrocarbons, represented by butane (C4), wherein the additive facilitates cylinder-resident reaction, aided by a low concentration of organometallic catalyst, to utilize the elements of the water combustion product, to hydrolyze olefin hydrocarbons such as octene, resident in the gasoline, into petroleum gas hydrocarbons such as butane, and to increase the ICE's efficiency of utilization of the energy of the fuel.

High temperature antioxidant additives and methods that improve a liquid fuel composition's thermal oxidative stability are disclosed. A liquid fuel composition may comprise a liquid fuel and a high temperature antioxidant additive. The high temperature antioxidant additive may comprise an indoline compound with a bicyclic ring structure, wherein the indoline compound comprises a six-membered aromatic ring and a five-membered aliphatic ring that share a carbon-carbon aromatic bond. The five-membered aliphatic ring may be heterocyclic and may comprise a nitrogen positioned in an alpha position to the six-membered aromatic ring.

Marine fuel oil compositions are provided that exhibit unexpectedly high cetane numbers after addition of a cetane improver. Methods of making such compositions are also provided. The unexpected nature of the marine fuel oil compositions is based in part on the ability to achieve a substantial improvement in estimated cetane number by addition of a cetane improver to a hydrocarbonaceous composition with a natural estimated cetane number of less than 35. These unexpectedly high increases in estimated cetane number for fuels or fuel blending components with low natural estimated cetane numbers can allow for production of fuel compositions with desirable combustion characteristics while also maintaining a higher level of aromatic compounds and/or reducing or minimizing the amount of distillate boiling range components in the fuel or fuel blending component.

A fuel additive formulation, method of use, and method of producing the fuel additive formulation are described. The fuel additive of the present disclosure comprises a mixture of nitroparaffins comprising nitropropane and nitromethane, a lubricant, and an aromatic hydrocarbon. The fuel additive formulation is substantially free of nitroethane. The combustion in an internal combustion engine of a fuel containing the additive results in reduced emissions relative to the combustion of a fuel not containing the additive.

Improved fuel compositions and fuel additive packages which serve to prolong stability at various ambient conditions and to increase fuel efficiency and fuel economy while also significantly reducing the level of multiple emissions constituents generated upon combustion of the fuels including CO.sub.2, NO.sub.x, SO.sub.x, Particulate Matter PM2.5, PM10 and Black Carbon. The fuels may include the hydrocarbon fuels gasolines, diesel fuels, biodiesel fuels, biomass diesel fuels, renewable fuels, synthetic fuels, algae-based fuels, kerosene fuel or heavy fuel oils, or may alternatively be hydrosols, and include an additive package having a sorbitan oleate, a polyoxyethylene alcohol, an alkylene glycol, and an amine. The fuels are mixed with an additive and are emulsified with clean, soft water having a water quality of 1 micron or less.

A diesel fuel substitute composition includes an alcohol, an acetal, and an additive comprising a component selected from the group consisting of C.sub.3-8 dialkyl ethers, alkylated phenols, RNO.sub.2, and combinations thereof. A method for forming the diesel fuel substitute is also provided.

A light fraction fuel composition for compression-ignited engines comprises about 25 v/v % to about 50 v/v % commercial diesel fuel; about 40 v/v % to about 69 v/v % straight run heavy naphtha about 5 v/v % to about 10 v/v % n-butanol; and about 0.2 v/v % to about 1.7 v/v % 2-Ethylhexyl nitrate. The relative percentages of commercial diesel fuel and straight run heavy naphtha are controlled to obtain a cetane number of at least 51 for a selected engine.