NOVELTY - The method comprises: adding an effective stress corrosion cracking inhibiting amount of a corrosion inhibitor into the blend of fuel and ethanol that contacts the metal; flowing the blend of fuel and ethanol through a pipeline including metal exposed to the blend of fuel and ethanol; adding an effective general corrosion inhibiting amount of a conventional corrosion inhibitor into the blend of fuel and ethanol; and storing the blend of fuel and ethanol in a storage tank including metal exposed to the blend of fuel and ethanol.    USE - The method is useful for inhibiting corrosion of metal exposed to a blend of fuel such as gasoline and diesel, and ethanol, where the fuel is useful for operating automobiles, farm equipment, and other devices having internal combustion engines.    ADVANTAGE - The method is capable of rapidly and effectively inhibiting corrosion of metal exposed to the blend of fuel and ethanol with high concentrations.    DETAILED DESCRIPTION - The method comprises: adding an effective stress corrosion cracking inhibiting amount of a corrosion inhibitor into the blend of fuel and ethanol that contacts the metal; flowing the blend of fuel and ethanol through a pipeline including metal exposed to the blend of fuel and ethanol; adding an effective general corrosion inhibiting amount of a conventional corrosion inhibitor into the blend of fuel and ethanol; and storing the blend of fuel and ethanol in a storage tank including metal exposed to the blend of fuel and ethanol. The corrosion inhibitor: is added into the blend of fuel and ethanol in an amount providing 10-600 ppm of the corrosion inhibitor based on the ethanol content of the blend; and is added as a solution including a solvent such as water and/or methanol. The ethanol concentration in the blend of fuel and ethanol is greater than 25%. The corrosion inhibitor: is added into the flowing blend of gasoline and ethanol at injection points spaced apart along the length of the pipeline; and is ammoniated to form an ammonium salt of the organic acid.