LYE series oil regeneration system machine is particularly suitable to regenerate of waste engine oil including diesel engine oil, gasoline engine oil and internal-combustion engine oils and used hydraulic oil, machinery’s lubricating oil and blended oils. It not only removes the impurities, water, and acid matter, organic and inorganic acid, carbon particulate matter and peroxides effectively. In gas engine oil, bitumen and colloid and other sludge can be removed similarly. But also can restore the color of used engine oil from black to new oil color and remove the scent rapidly.