NOVELTY - Producing biodiesel fuel involves a) providing a source of triglycerides; b) mixing a blended alcohol composition with a catalyst, where the blended alcohol composition comprises a ketone; c) reacting the source of triglycerides with the blended alcohol composition and catalyst to form a mixture of at least one fatty acid alcohol ester and glycerin; d) separating the fatty acid alcohol ester from the glycerin; and e) optionally, purifying the fatty acid alcohol ester to produce a bio-fuel.    USE - For producing biodiesel fuel in a transesterification process (claimed).    ADVANTAGE - The method allows manufacture of biodiesel in quick and economical manner as compared to traditional bio-diesel production. The use of the blended alcohol composition allows the transesterification process to proceed under ambient temperature and pressure conditions within a relatively short reaction time. The use of the composition in the transesterification process (in place of the methanol or other lower alcohol used in the prior art) allows the reaction to proceed at a faster rate, and produces a bio-diesel product with less glycerin produced as a byproduct. Using the method, it is possible to reduce the amount of glycerin produced to less than 1%. The process still undergoes a transesterification reaction but can be performed at production speeds without the use of chemical reactors and at room temperature within 10-15 minutes. The process does not need any additional pressure, cavitation or ultrasonic devices that are typically needed by other reactor devices to proceed at these speeds. Thus, the transesterification process can proceed quickly at room temperature and under normal (i.e. ambient) pressure. The process does not require a purification step, and in most instances, once the biodiesel reaction has occurred, the biodiesel can simply be separated from the by-product. The blended alcohol composition reduces by half the amount of glycerin produced in the process. The ethyl acetate keeps the reaction at room temperature and that the use of the ketone as a chemical mediator prevents glycerin from forming, i.e. the ketone does not allow carbon to form the necessary bonds to produce glycerin so the result is that less glycerin is produced. The use of the ketone interrupts the formation of glycerin and allows the fourth mono alkyl ester to be created. This allows all of the input materials to become a consumable product, resulting in an improved conversion to the biodiesel product.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a blended alcohol composition for use in making a bio-fuel in a transesterification process comprising (wt.%): at least one lower alcohol (96-98); ketone (1-3); and ethyl acetate (1-3).