The Mini refinery unit can be applied to Crude oil, black engine oil, plastic oil and shale oil, to produce Petrol, diesel and kerosene, as major products. The Mini Units will process a crude oil under the atmospheric distillation unit/vacuum distillation unit and catalytic cracking unit, heating with fuel oil or gas to 410 ℃. The refined Petrol, diesel and kerosene will be pumped or transferred to a storage tanks, while the residue will be saved for an industrial use or could be used as fuel for the unit.