NOVELTY - Method for producing fatty alcohol composition, involves (i) culturing a recombinant microorganism in a suitable culture medium, where the recombinant microorganism comprises a gene encoding a heterologous fatty acyl reductase (FAR) enzyme having at least 30% sequence homology to SEQ ID NOs: 2, 6 and 14 or their functional fragments, and (ii) allowing expression of the gene, where the gene expression results in the production of a composition of fatty alcohols.    USE - The method is useful for producing fatty alcohol composition used as fuel composition (claimed).    ADVANTAGE - The method is inexpensive.    DETAILED DESCRIPTION - Method for producing fatty alcohol composition, involves (a) (i) culturing a recombinant microorganism in a suitable culture medium, where the recombinant microorganism comprises a gene encoding a heterologous fatty acyl reductase (FAR) enzyme having at least 30% sequence homology to SEQ ID NOs: 2, 6 and 14 or their functional fragments, and (ii) allowing expression of the gene, where the gene expression results in the production of a composition of fatty alcohols, or (b) (1) culturing a recombinant Escherichia coli in a nutrient medium under suitable conditions, where the recombinant E.coli comprises a nucleic acid sequence encoding a heterologous FAR enzyme comprising an amino acid sequence having at least 75% sequence homology to SEQ ID NOs: 2, 6 and 14 or their functional fragments, (2) allowing expression of the FAR enzyme, and (3) producing the fatty alcohol composition. INDEPENDENT CLAIMS are included for the following:    (1) composition comprising the isolated fatty alcohols produced by above-cited method;    (2) fuel composition comprising alkanes and esters;    (3) isolated nucleic acid sequence encoding FAR enzyme exhibiting at least 30%, 80% or 90% sequence homology to SEQ ID NOs: 2, 6 and 14 or their functional fragments;    (4) vector comprising the above-cited nucleic acid;    (5) host cell obtained by transforming the above-cited vector; and    (6) isolated FAR enzyme comprising an amino acid sequence exhibiting at least 30% sequence homology to SEQ ID NOs: 2, 6, and 14 or their functional fragments.