NOVELTY - Reduction (M1) of corrosion in an internal combustion engine having fuel injectors (preferably copper and/or silver) involves: combusting in the engine a fuel composition (c1) comprising gasoline, ethanol and at least one fuel additive (where corrosion is reduced relative to the corrosion when combusting a fuel composition without ethanol). The fuel additive is selected from component A. The component A is selected from succinimide dispersants, succinamide dispersants, amides, Mannich base dispersants, and polyetheramine dispersants.    USE - For the reduction of corrosion in an internal combustion engine having fuel injectors e.g. copper and silver; for gasoline-engines combusting an ethanol-containing fuel (claimed); in preventing or minimizing corrosion of metal surfaces and certain plastic or synthetic parts (such as fuel, pumps, valves, gaskets, float devices, relay or signaling devices, gauges, screens, filters, intake valves, pistons, and others can all experience some degree of corrosion, also sometimes regarded as wear problems) or surfaces in combustion engines that come in contact with fuel containing ethanol    ADVANTAGE - The corrosion is reduced relative to the corrosion when combusting a fuel composition without ethanol (preferably the copper and/or silver component(s) has reduced corrosion relative to the corrosion observed when the copper and/or silver component(s) are exposed to a fuel without ethanol). The fuel additive improves corrosion inhibition in engines combusting a fuel containing ethanol; reduce, eliminates and prevents corrosion of engine combustion surfaces and surfaces of engine components exposed to the fuel containing ethanol; improve the properties of the resulting fuel and also enhance the benefits to the consumer and to the environment of using varying amounts of ethanol as a fuel in combustion engines; is effective in preventing or minimizing corrosion of metal surfaces and certain plastic or synthetic parts or surfaces in combustion engines that come in contact with fuel containing ethanol.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a composition (c2) to reduce corrosion in an internal combustion engine combusting an ethanol-containing fuel comprises gasoline, ethanol, and at least one material selected from the component A; and component B. The component B is selected from succinimide dispersants, succinamide dispersants, amides, Mannich base dispersants, polyetheramine dispersants; phenolics, hindered phenolics, aryl amines, diphenyl amines, monocarboxylic acids, dicarboxylic acids, polycarboxylic acids, p-phenylenediamine and dicyclohexylainine, oxylated alkylphenolic resins, formaldehyde polymer with 4-(1,1-dimethylethyl)phenol, methyloxirane and oxirane, methyl cyclopentadienyl manganese tricarbonyl, cyclopentadienyl manganese tricarbonyl, azides, tetraethyl lead, peroxides, alkyl nitrates, monoesters, diesters, ethers, ketones, diethers, polyethers, glycols, glymes, oxiranes, 1-8C aliphatic hydrocarbons, butylene oxide, propylene oxide, ethylene oxide, epoxides, butane, pentane, xylene, nitrous oxide, nitromethane, phenates, salicylates, sulfonates, nonylphenol ethoxylates, fuel-soluble alkali detergents and alkaline earth metal-containing detergents; and    (2) a corrosion inhibitor fuel additive concentrate for gasoline engines combusting an ethanol-containing fuel comprises at least one corrosion inhibitor and diluent selected from an oil, fuel, gasoline, ethanol, solvent, carrier fluid, and other liquid materials combustible in a gasoline engine.