the like the cycloparaffin fraction described herein consists of cycloalkanes or molecules containing at least one cycloalkane ring non limiting examples of components of the cycloparaffin fraction include cyclohexane cyclopentane methylcyclohexanes methylcyclopentane dimethylcyclohexanes dimethylcyclopentanes ethylcyclohexane and ethylcyclopentane the olefinic fraction described herein can contain linear branched and cyclo olefins non limiting examples of components of the olefinic fraction include butenes pentenes isopentenes hexenes and diisobutylene the iso paraffinic branched paraffinic fraction and n paraffinic linear paraffinic fraction described herein consist respectively of branched and straight chain alkanes non limiting examples of iso paraffinic fraction and n paraffinic fraction components include n pentane n hexane n heptane 2 methylpentane and iso octane fuels described herein in some aspects contain less than 1 by volume of benzene and less than 80 ppm by weight of sulfur fuels described herein can be obtained by the addition of either pure components or blends of pure components or the use of refinery streams having high concentrations of the desired compounds those of ordinary skill in the art are able to identify refinery streams that are useful in providing the hydrocarbon fractions of fuels used in the methods described herein for example fluid catalytic cracking fcc streams contain relatively high levels of aromatics cycloparaffins and olefins reformate streams contain very high levels.