NOVELTY - Enhancing oil recovery by proliferating microbial consortium at up to 90 degreesC involves inoculating the consortium having accession number MTCC S2-001, in nutrient medium I in presence of anaerobic gas mixture; incubating to obtain seed population; inoculating in nutrient medium II, to obtain biological solution; injecting into oil well; and injecting water to push entire solution in pores of well. The consortium proliferates and enhances recovery.    USE - For enhancing oil recovery from oil wells (claimed).    ADVANTAGE - The novel method enhances oil recovery by up to threefold. The microbial consortium used in the method produces surfactants that dissociates the oil and reduces surface tension between oil and rock surface; provides carbon dioxide and methane that creates localized pressure in core rock pores and helps in sweeping the oil from the oil well; and produces volatile fatty acids that solubilize the rock surface and dislocate from oil bearing pores. The microbial consortium can survive temperature beyond 70 degreesC. The method avoids formation of anaerobic bacteria in oil reservoir; reduces viscosity of oil by production of gases and alteration in the rock characteristics through production of volatile fatty acids and thus enhances oil recovery from the oil wells. The microbial consortium produces alcohol in oil reservoir that reduces viscosity of crude oil in the oil well.    DETAILED DESCRIPTION - Enhancing the oil recovery from an oil well by proliferation of microbial consortium at a temperature up to 90 degreesC involves:    (a) inoculating the microbial consortium having accession number MTCC S2-001 deposited with Institute of Microbial Technology, in a nutrient medium I in the presence of anaerobic gas mixture of N2, CO2 and H2;    (b) incubating the microbial consortium at a temperature up to 90degreesC to obtain seed population of microbial consortium;    (c) inoculating the microbial consortium under aseptic condition in nutrient medium II to obtain biological solution;    (d) injecting the biological solution into the oil well, followed by injecting water into the oil well to push the entire solution in the pores of the oil well, proliferating the microbial consortium that dissociates the oil; and    (e) obtaining the enhanced oil recovery from the oil wells.    An INDEPENDENT CLAIM is included for new microbial consortium for enhancing oil recovery from oil wells having accession number MTCC S2-001.