NOVELTY - Method (I) for producing a diesel fuel using a basic product in the form of 1-5C alcohols, comprises producing a synthetic hydrocarbon (having a isoparaffin portion of at least 65 mass%) by oligomerization or polymerization of an olefin hydrocarbon mixture (having a portion of odd olefins and isoolefins of at least 40 mass.%) obtained by the partial dehydration of 1-5C alcohols, and after a subsequent hydrogenation and rectification, separating the diesel fuel.    USE - The diesel fuel is useful for mixing with conventional fuel, a bio-diesel fuel e.g. a fatty acid methyl ester or other synthetic hydrocarbons. The aircraft fuel is useful for mixing with conventional fuel or other synthetic hydrocarbons (all claimed).    ADVANTAGE - The basic product (i.e. 1-5C alcohol) is of biogenic origin and is easily available. The aircraft fuel/diesel fuel in its hydrocarbon content shows up to 1.2x 10-12 mass% of the 14C radionuclide due to the use of biogenic raw materials. The diesel fuel shows improved stability at low temperature.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a method (II) for producing a diesel fuel using a basic product, which consists of at least 1-5C alcohols, comprising producing a synthetic hydrocarbon with an isoparaffin portion of at least 65 mass.% by dehydration of 1-5C alcohols in the basic product and simultaneous oligomerization of the basic product using a water-compatible catalyst in a single process stage, and after a subsequent hydrogenation and rectification, removing the diesel fuel;    (2) a diesel fuel, obtained by the method (I), exhibiting a cold filter plugging point of less than or equal to 0 degrees C, preferably less than or equal to -20 degrees C;    (3) at least partially biogenic diesel fuel, obtained by the method (II), exhibiting a cold filter plugging point of less than or equal to 0 degrees C, preferably less than or equal to -20 degrees C;    (4) a method (III) for producing a aircraft fuel by the method (I) or (II), where the portion of odd olefins and isoolefins is at least 50 mass.% and the produced synthetic hydrocarbon has an isoparaffin portion of at least 75 mass.%; and    (5) an aircraft fuel obtained by the method (III) exhibiting a freezing point of less than or equal to -47 degrees C.