addition to other conventional fuel additives commercial additives for enhancing the lubricity of diesel fuels are readily available and may improve the final performance of the fuel compositions of the present invention the invention will be further illustrated by the following non limiting examples fuel compositions are composed of the following ingredients in the volume percent proportions indicated the examples above show several blend combinations that produce calculated cetane numbers of 50 or better and have reid vapor pressure ratings greater than at least 2 psig for the hypothetical examples illustrated in table 3 the cetane numbers are estimated in a linear fashion as described by the following equation blend cetane number u03c3 volume fraction component i x cetane number of component i for i 1 to x and x the number of blend components 1 for example blend f comprised of 5 components including dmm at 20 by volume with a cetane number of 45 hexane at 30 by volume with a cetane number of 45 heptane at 25 by volume with a cetane number of 56 octane at 20 by volume with a cetane number of 64 and nonane at 5 by volume with a cetane number of 72 yields a blend cetane number equal to 0 2 45 0 3 45 0 25 56 0 2 64 0 05 72 or 52 9 linear volume proportional weighting of cetane numbers of the blend components is widely accepted in the petroleum industry as a good method for.