TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The modified methanol comprises (in wt.%): methanol (60-95), surfactant (1-10), antiknock agent (1-10), antiswelling agent (0.1-10), antioxidant (0.01-1) and corrosion inhibitor (0.001-1). Preferred Components: The surfactant is chosen from Tween-20 (RTM: Polysorbate 20), Tween-21 (RTM: Polysorbate 21), Tween-40 (RTM: Polysorbate 40), Tween-60 (RTM: Polysorbate 60), Tween-61 (RTM: Polysorbate 61), Tween-80 (RTM: Polysorbate 80), Tween-81 (RTM: Polysorbate 81), Tween-85 (RTM: Polysorbate 85), Span-20 (RTM: Sorbitan fatty acid esters), Span-65 (RTM: Sorbitan fatty acid esters), Span-80 (RTM: Sorbitan fatty acid esters), Span-85 (RTM: Sorbitan fatty acid esters), OP4, OP7, OP9, OP10 and their mixtures, where the hydrophile-lipophile balance (HLB) of the surfactant is 2.5-7. The antiknock agent is chosen from butyl acetate, dibutyl phthalate, butyl phthalate, dimethyl phthalate, methyl tertiary butyl ether, isopropyl ether, nitromethane and their mixtures. The antiswelling agent is chosen from imidazoline amide, N,N-salicylidene-1,2-propane diamine, 2-amine ethyl heptadecenyl imidazoline, N-glyptal sarcosine, 1-(2-aminoethyl)-2-heptadecenyl imidazoline and their mixtures. The antioxidant is chosen from N,N-salicylidene-1,2-propane diamine, N,N-di-sec-butyl-p-phenylenediamine, N,N-salicylidene-1,2-quadrol, N,N-diisopropylidene p-phenylenediamine, dimethyl phenol, bisphenol A, bisphenol F, industrial antioxidant 501 and their mixtures. The industrial corrosion inhibitor is chosen from nitrite dicyclohexyl amine, isopropanol, dibutylamine, glycerol triacetate, benzotriazole, N-methyl morpholine, industrial corrosion inhibitor 1201, industrial corrosion inhibitor EC1023A, industrial corrosion inhibitor NET114 and their mixtures. The gasoline is 90# to 97# commercial gasoline. The auxiliary solvent is chosen from propanol, isopropanol, butanol, isobutanol, m-xylene, o-xylene, naphthenic acid, naphthenic acid, n-octyl alcohol, 90# solvent oil, 120# solvent oil and their mixtures.