to a diesel cycle fuel engine where the fuel can be able to be produced by means of biotechnology from renewable biologic source including processes of fermentation of sugars or materials available on sugar and ethanol plants as an example a produced fuel can be used conventionally as replacement of diesel in urban transportation vehicles or roads and can be an alternative to diesel fuel the composition can be employed alone or mixed to fossil diesel oil application_number US 201113816364 A description of the foregoing patents pertaining to fuels that employ butanol as part of a composition described is the use of isomeric alcohols of butanol as fuel for otto cycle engines i e suitable for spark ignition or mixtures motor fuel cycle diesel that will eventually have their butanol or alcohol isomers but not described is alcohol and butanol isomer use as main fuels butanol isobutanol or other isomer alcohol of 4 carbons by itself does not have similar characteristics to diesel which are required to work properly in diesel cycle engines as described below butanol and its isomers have high octane rating that is resistance to detonation by compression this feature is desirable in fuels for otto cycle engines however this is opposite to desirable characteristics of fuels for diesel engine cycle.