NOVELTY - A methanol gasoline core mother liquor is prepared by mixing (in wt.%) solution (A) containing n-octane (30-40), methyl tert-butyl ether (30-40) and isobutanol (25-35), solution (B) containing anhydrous ethanol (20-30), ammonium nitrate (10-15), nitro diluent (22-32), ethylene glycol ethyl ether (13-17) and xylene (15-25), solution (C) containing nitroethane (20-30), methylcyclohexane (23-33), methylnaphthalene (20-30) and benzyl alcohol (18-25), solution (D), solution (E), solution (F) and solution (G) at normal temperature for 20-40 minutes.    USE - Methanol gasoline core mother liquor is used for methanol gasoline (claimed).    ADVANTAGE - The methanol gasoline having improved fuel efficiency is prepared using the methanol gasoline core mother liquor, with reduced energy consumption.    DETAILED DESCRIPTION - A methanol gasoline core mother liquor is prepared by mixing (in wt.%) solution (A) containing n-octane (30-40), methyl tert-butyl ether (30-40) and isobutanol (25-35), solution (B) containing anhydrous ethanol (20-30), ammonium nitrate (10-15), nitro diluent (22-32), ethylene glycol ethyl ether (13-17) and xylene (15-25), solution (C) containing nitroethane (20-30), methylcyclohexane (23-33), methylnaphthalene (20-30) and benzyl alcohol (18-25), solution (D) containing n-heptyl alcohol (25-35), benzotrifluoride (30-40) and n-octanol (30-40), solution (E) containing isopropanol (43-53), T702-type rust inhibitor (15-20), T106-type detergent (13-17) and T102-type detergent (15-25), solution (F) containing n-butanol (50-60), T747-type rust inhibitor (20-30) and T706-type rust inhibitor (15-25) and solution (G) containing isobutanol (15-25), T502-type antioxidant (30-40), isopentyl aldehyde (4-6), morpholine (12-17) and cumene (20-30), at normal temperature for 20-40 minutes, in a ratio of equal proportion of plus minus 5%. An INDEPENDENT CLAIM is included for methanol gasoline. The methanol gasoline core mother liquor (4-8) and methanol (92-96) are stirred uniformly and reacted for 20-40 minutes, to obtain modified alcohol. The obtained modified alcohol (65-85) is then mixed with national standard gasoline/component oil/naphtha (15-35) and reacted for 20-40 minutes, to obtain methanol gasoline having methanol content of 99.5-99.9%.